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Let’s talk citizen science: exploring the challenges and opportunities in mainstreaming citizen science

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Contemporary science is complex, interdisciplinary, uncertain, and very difficult to define. These same characteristics apply to citizen science, which has the power to change science from the inside and make it more democratic, open and inclusive.

Author / translator European Citizen Science Association

Contemporary science is complex, interdisciplinary, uncertain, and very difficult to define. These same characteristics apply to citizen science, which has the power to change science from the inside and make it more democratic, open and inclusive. Yet, as powerful as it is, citizen science is still only used by a minority of scientists and actively involves a small fraction of people. How can we make it more mainstream?
This game, guided by the European Citizen Science Association’s (ECSA) “Ten principles of citizen science”, aims to explore the opportunities and challenges inherent in citizen science. Even though there is a general agreement that citizen science includes activities that actively involve the public in scientific research to generate new knowledge or understanding, and thus has the potential to bring together researchers, policy-makers, and society as a whole in an impactful way, its characteristics are expressed differently – depending on the context. Even the ECSA Ten principles, which are considered a prominent reference, also leave open the possible applications and methods of citizen science as well as its interpretations.

The game was developed by Enrico Balli, Chrysanthi Bairaktari, Simona Cerrato, Franziska Žibert

Created 30 May 2024
Last edited 7 May 2025
Topics Education, Science, Social inclusion

Policy positions

Policy position 1

Citizen science should be integrated in school curricula of all levels, from primary schools to PhDs and become the main approach to research.

Policy position 2

Research projects with a citizen science component must be prioritised in public funding programmes.

Policy position 3

Research carried out with a citizen science approach should be used to inform local and national policies, so that citizens are more involved in decision-making processes regarding science and research.

Policy position 4

Citizen science can be used as a research approach only in specific fields and cases where the quality of the data can be directly controlled by the researchers.

Policy position 5

Scientific research must remain completely free even in the choice of methodological approaches, and no one should impose one approach rather than another.

Story cards

History buff, Sarah, stumbled upon a project called "Transcribe Bentham." The project aimed to transcribe the handwritten manuscripts of 18th-century philosopher Jeremy Bentham. Using her sharp eyes and historical knowledge, Sarah began deciphering Bentham's often challenging handwriting.

Her work, combined with the efforts of other citizen scientists, helped unlock a wealth of information about Bentham's philosophies. This historical treasure trove provided valuable resources for researchers studying the Enlightenment period. Sarah felt a thrill of contributing to the preservation of historical knowledge and making it accessible to a wider audience.

The History Hunter

Dr. David Patel, an air quality researcher, was skeptical of citizen science. He envisioned chaotic data and unreliable observations. But his project on urban air pollution needed a wider net. His app, "Canary Watch," tasked citizens with monitoring the behaviour of their pet canaries, known for their sensitivity to air quality.

David was surprised at the meticulous data and the passionate community that formed. Citizen scientists even reported unusual canary behavior during industrial accidents, leading to faster investigations. David, impressed, became a true believer in citizen science.

The Case of the Curious Canaries

Dr. Emily Lopez, a veterinarian, was studying feline behaviour and its link to potential health issues. Traditional methods were expensive and time-consuming. Citizen science, she thought, was a gamble. Her app, "Cat CSI," encouraged pet owners to record their cats' daily behaviour like activity level, litter box use, and vocalisations.

The response was overwhelming. The app not only revealed subtle behaviour changes associated with illnesses but also identified positive behavioural changes linked to diet and enrichment. Dr. Lopez, with the help of her "Cat CSI" team, gained valuable insights into feline health and well-being.

The Cat CSI Unit

History enthusiast, Amelia, stumbled upon "Zooniverse," a platform hosting various citizen science projects. One project caught her eye: "Lost Maya City." Using high-resolution satellite imagery, Amelia helps archaeologists identify potential Maya ruins hidden beneath the dense rainforest canopy of Central America.

By clicking and outlining suspicious shapes in the imagery, Amelia contributes to the rediscovery of lost settlements. She feels the thrill of exploration, helping piece together the story of ancient civilisations. The project rekindled her passion for history and connected her to a global community of citizen archaeologists.

The Lost City Explorer

Retired meteorologist, John, missed the thrill of weather forecasting. He discovered "Cloud Appreciation Society," a citizen science project where anyone could help classify cloud types. Using high-resolution satellite images, John identified different cloud formations like cirrus, cumulus, and stratus.

His data, combined with observations from weather enthusiasts worldwide, helped researchers refine cloud classification models used in weather forecasting. John enjoyed the camaraderie of the online community, discussing cloud formations and their impact on weather patterns. He felt his experience was valuable, even after retirement.

The Cloud Classifier

Marine biologist, Dr. Anya Petrova, was desperate. Coral reefs were dying, and traditional research methods were too slow. She created "Coral Keepers," a citizen science project where divers documented reef health. Initially, data was inconsistent. But Anya, impressed by the citizen scientists' enthusiasm, developed online training modules.

Slowly, the data quality improved. One diver, Sarah, a retired teacher, meticulously documented a new coral bleaching pattern. Anya used Sarah's data to secure emergency funding for reef restoration, a direct result of citizen science.

The Reef Revivalists

Dr. Maria Rodriguez, a mycologist, felt isolated in her lab, surrounded by petri dishes and silent spores. Citizen science, she thought, was for charismatic creatures, not the unseen world of fungi. However, her research on the spread of a fungal disease in oak trees needed a wider reach. Her app, "Friend of Fungi," allowed citizens to photograph suspicious mushrooms and upload them.

Maria was surprised by the response. Citizen scientists not only documented the disease spread, but also discovered an unknown and potentially beneficial fungal species. Maria, now collaborating with a passionate online community, felt a newfound connection to her research.

The Phone a Friend for Fungi

My class is located near a coral reef, and its health is a critical local issue. We found a citizen science project where volunteers monitored coral health. The kids learned about different coral species, threats like pollution, and how to record observations.

Armed with waterproof notebooks and a sense of purpose, they snorkeled alongside marine biologists, collecting valuable data. It wasn't just science – it was conservation in action, and the students felt empowered to protect their local environment.

Reef Rangers

I used to think science was all about textbooks and memorising facts. Then I found this citizen science project where students collected data on local ladybug populations. It was amazing! The kids were scouring the schoolyard, learning to identify different species, and meticulously recording their findings.

We uploaded it all to the project website, and a few weeks later, we saw our data points contributing to a national map of ladybug distribution. It completely transformed my students' understanding of science – they were part of a real discovery!

The Bug Detectives

Gardening enthusiast, Maria, noticed unusual spots appearing on her rose bushes. Through a citizen science project called "Lost Ladybug Project," she learned about the decline of ladybug populations and their role in controlling garden pests. The project also offered a platform for gardeners to report potential plant diseases.

Maria uploaded photos of her rose bushes and received help from other participants and experts in identifying the problem as a fungal infection. The project offered guidance on organic pest control methods, encouraging Maria to adopt sustainable gardening practices. She became a community resource for other gardeners, helping them identify plant problems and promote natural pest control methods.

The Plant Detective

A chemistry enthusiast, David, discovered a citizen science project called "SciStarter" while browsing online. One project piqued his interest: "Water Quality Testing." Using a kit provided by the project, David started testing the water quality of a nearby stream. He measured parameters like pH, nitrates, and phosphates.

His data helped monitor the health of the waterway and identify potential sources of pollution. David shared his findings with local environmental groups, prompting them to investigate potential contamination sources. The project ignited a passion for environmental chemistry in David, leading him to volunteer with local water conservation efforts.

The Backyard Chemist

Living in a bustling metropolis, Sarah often felt disconnected from nature. However, a local "Urban Wildlife Watch" project sparked a new appreciation for the city's hidden biodiversity. Equipped with a smartphone app, Sarah documents sightings of birds, squirrels, and even the occasional stray cat in nearby parks and green spaces.

Her data contributes to a growing database used by urban planners to create wildlife corridors and green spaces within the city. Sarah connects with other citizen scientists, organising nature walks and community events, turning her concrete jungle into a vibrant urban ecosystem.

The City Nature Detective

Meet Maya, a 10-year-old fascinated by creepy-crawlies. Through a citizen science app, she discovers "Bug Blitz," a project tracking the spread of beneficial insects in her local community. Armed with a magnifying glass and a collection sheet, Maya becomes a "Bug Detective," scouring her backyard and neighbourhood parks for ladybugs, lacewings, and other helpful insects.

Her meticulous observations, uploaded to the app, contribute to valuable data for scientists studying the health of local ecosystems. Maya feels a sense of accomplishment, knowing her bug-hunting is helping researchers develop strategies to protect these tiny allies of our gardens.

The Bug Detective

David, a busy working dad, finds his evenings filled with a new kind of magic. He joins "Galaxy Zoo," a citizen science project where anyone can help classify galaxies captured by powerful telescopes. With his young son by his side, David spends evenings online, classifying galaxies into spirals, ellipticals, or something else entirely.

Their contributions join thousands of others, helping scientists map the vastness of the universe and identify previously unknown galaxies. David finds a shared passion with his son, igniting their curiosity about the cosmos. He realises that even a few minutes a night can contribute to groundbreaking discoveries.

The Stargazing Dad

Elena, a retired marine biologist, volunteers with a local coral reef monitoring project. Armed with waterproof data sheets and a keen eye, she dives alongside researchers to document the health of the coral reefs. Her observations track changes in coral health, the presence of fish species, and the impact of environmental factors.
Elena's experience proves invaluable, helping researchers understand the threats facing the reef and develop conservation strategies. She shares her knowledge with fellow volunteers, fostering a sense of community and empowering others to protect this underwater world.

The Reef Rehabilitator

Living in a bustling city, Ben was bothered by constant traffic noise. He discovered "NoiseWatch," a citizen science project collecting data on ambient noise pollution. Using a smartphone app, Ben started recording noise levels in his neighbourhood at different times of the day.

His data became part of a larger dataset used by urban planners to identify areas with high noise pollution. They used this information to implement noise reduction measures like traffic management and designated quiet zones. Ben saw a direct impact of his contribution, leading to a quieter and more livable neighbourhood.

The Neighborhood Noise Patroller

Disillusionment settled over John, a volunteer for a firefly monitoring project. Visions of magical evenings spent counting twinkling lights in meadows had given way to the harsh reality. Data collection involved monotonous walks along designated transects in near darkness, meticulously counting fireflies within a limited area. It was repetitive, frustratingly buggy (literally!), and the complex data sheet offered little clarity.

After weeks, John observed a similar struggle amongst other volunteers. Confusion bred frustration, and participation dwindled.

The final blow came from a news report claiming the project had yielded "groundbreaking data" on firefly decline. It felt hollow. They hadn't explored the reasons behind the decline, and the data itself felt questionable considering the collection issues. John was left disillusioned, unsure if her contributions had any real value.

The disillusioned firefly monitor

A sense of discouragement settled over avid birdwatcher, Shima. She had enthusiastically joined a project monitoring raptor populations, thrilled at the prospect of aiding in the tracking of these majestic birds. However, the project's reliance on a sole, outdated mobile app quickly dampened his spirits.

The app's clunkiness and lack of proper training materials made identifying raptors from blurry phone camera pictures nearly impossible, especially for novice birdwatchers like Shima. The project forum, intended for sharing sightings and fostering discussion, offered only frustration. Experienced birders vented about the app's limitations, while others echoed Shima's struggle with confident identification. The project leader, rarely active in the forum, offered minimal support.

Disheartened and feeling her contributions to be futile, Shima eventually stopped participating. She saw it as a missed opportunity - a chance to leverage the collective knowledge of bird enthusiasts and gather insightful data squandered by poor planning.

The discouraged birdwatcher

Maya, a high school student on a family vacation to a tropical island, was coerced by her eco-warrior older sister to participate in a coral reef monitoring program. Maya envisioned snorkelling amongst vibrant coral gardens, but the reality was documenting bleached and dying coral colonies.

The data collection app felt impersonal, and the experience left Maya feeling overwhelmed by the vastness of the environmental problem. Disheartened, she questioned the project's impact and how her small contribution could make a difference in the face of such a large-scale issue.

The Reluctant Reef Recorder

Ben, a retiree with a passion for amphibians, signed up for a local frog monitoring project. The project involved late-night listening sessions in remote ponds, hoping to hear specific frog calls. However, the provided audio guide was confusing, and the cacophony of nighttime sounds made it near impossible to distinguish target frog calls from crickets and other insects.

Ben felt frustrated by the lack of training and the project's reliance on volunteers with potentially limited auditory acuity. He eventually quit, convinced his participation wasn't contributing meaningful data.

The Frustrated Frog Finder

A childhood dream of swimming with dolphins led Lisa to a citizen science project. Visions of documenting playful pods shattered as reality set in. The designated spot: a windswept cliff far from dolphin activity. Weeks passed battling cold winds, choppy seas, and the occasional distant fin. The data app, clunky and demanding detailed info, mocked Lisa's inability to gather specifics from afar.

Frustration mounted with unanswered emails to the project leader seeking tips and app clarification. A glimmer of hope arrived with a pod closer to shore, but the app crashed, swallowing her valuable sighting. Defeated and feeling disregarded, Lisa packed up, the dream of contributing to research replaced by a cold, lonely vigil.

The Disgruntled Dolphin Documenter

Dr. Evelyn Carter was a woman on a mission. The dusty confines of traditional archives were no longer enough for this historian of early America. She yearned to breathe life into the faded pages of history, to hear the echoes of ordinary colonists. And so, she embarked on a daring endeavor: the "Colonial Chronicles" project.

It was a leap of faith. Many in the academic world scoffed at the idea of relying on the public for historical data. But Carter was undeterred. With meticulous planning, she transformed potential chaos into a structured exploration, providing clear guidelines and training for her citizen historians. Slowly but surely, the project gained momentum, and the quality of submissions soared.

Then came the breakthrough. A retired teacher, Benjamin by name, stumbled upon a hidden trove of letters. These intimate accounts of an indentured servant's life painted a vivid portrait, challenging long-held beliefs about colonial society. Carter's project had done the impossible: it had transformed public participation into a cornerstone of academic discovery.

A Historian's Quest

Anya Petrova was adrift. The world of academia, once a thrilling intellectual ocean, had become a stagnant pool. Her research on the gender pay gap yielded cold, hard facts, but the human stories behind the numbers remained elusive. She craved a deeper connection to the lives she studied.

It was a leap of faith, but Anya created "Equalize." She transformed her smartphone into a portal for voices, a digital confessional where people could anonymously share their experiences with workplace inequality. The response was overwhelming. Stories poured in, raw and honest, painting a portrait of systemic injustice far more vivid than any graph or chart.

Anya found herself at the intersection of research and activism. With every shared experience, her understanding deepened. The data, once sterile, now pulsated with life. She was no longer a detached observer, but a catalyst for change. And as she collaborated with the growing community of app users, she realized that the most powerful tool for social transformation might not be found in a library, but in the hands of the people.

A Bridge Between Theory and Reality

INFO CARDSISSUE CARDS

Citizen science data

Citizen science projects produce various sets of data that are utilised to further scientific research and shape policy. However, these sets of data are sometimes not comparable, lack quality or information.

Engagement and motivation of citizens

Citizen science projects are often voluntary and require time and effort from the participants. Many projects rely on intrinsic motivation, but in order to engage and retain citizens, often other incentives are needed. To keep participants engaged throughout the project, it’s crucial to understand and nurture their motivations.

Communication with the community

To engage a wide range of citizens, clear and active communication is needed, which requires time and human effort. Often still the communication happens top-down, initiated by the researchers that may employ jargon, specific language and terminology.

Technological barriers

Citizen science projects often involve technology and internet based applications, which poses barriers for participants that don’t have reliable broadband access or aren’t familiar with the technological set up.

Lack of government support

Local communities and projects often lack the support of their governments to widen the reach and scope of citizen science projects, both through advocacy as well as funding.

Funding challenges

There is a strong mismatch between the current funding opportunities and the diversity of citizen science practices and initiatives. Innovative and flexible financing models must be created to meet the needs of a range of different stakeholders. For example, although citizen science is included in European research funding programmes, many national funders do not have schemes that can accommodate it.

Lack of trust 1

A significant part of the scientific community is still sceptical about the idea that the public can make useful contributions to science. This is partially due to lack of trust towards the reliability of citizen-generated data.

Lack of trust 2

A trust gap arises from the lack of alignment between community priorities and research agendas, which can easily keep communities away from citizen science projects when they find little resonance between the scholarly investments and their own community priorities. This is especially true for minorities or groups that have been historically underrepresented in science.

Plurality of projects and platforms

While it is great that there are many different initiatives, projects and groups that engage in citizen science, it can be overwhelming for newcomers to find out how to join the activities and where to find the most up to date information for their region and interests.

Ensuring inclusiveness of citizen science

An inclusive citizen science practice encourages engagement from all members of society, whatever their social status, sociocultural origin, gender, religious affiliation, literacy level, or age. Yet it seems from several studies that citizen science also creates or recreates inequalities already present in society.

Training (for participants and scientists)

Citizen science projects require a wide range of skills, from co-design techniques and digital tool development to crowdsourcing strategies, communication skills, ethics and many others. Despite the growing significance of citizen science there is still a lack of training for all stakeholders involved, including scientists, citizens, educators, funders, policy and decision makers, civil society organisations.

Adapting the project timing

Unlike traditional research projects, citizen science initiatives often require a more flexible and open-ended approach to planning. Engaging citizens and stakeholders effectively can be a time-consuming process, and the effort required can be challenging to predict in advance. This flexibility may contradict the established planning methods of conventional research.

Recognising the citizen scientists’ contribution

There is a tendency to focus on recognition in scientific publications produced by professional researchers, yet different types of recognition can be used. Citizen scientists can be, for example, encouraged to independently write an article about their research experience, or participate as speakers at events. Their opinions and observations must be taken seriously by the research staff, and they should receive feedback on their contributions.

Bridging the digital divide

Unequal access to technology and digital literacy can create barriers to participation, potentially excluding certain segments of the population. Navigating this challenge requires innovative approaches, such as developing alternative participation methods or providing digital literacy training, to ensure inclusivity and equitable access.

Data privacy and security

As data collection scales, robust measures must be implemented to protect the privacy and security of citizen scientists’ data. This necessitates transparency in data collection practices, informed consent mechanisms, and secure data storage and management protocols.

Ensuring responsible use of technology

The integration of technology should be guided by ethical principles and responsible use considerations. This includes ensuring citizen scientists understand how their data will be used, fostering responsible data collection practices, and safeguarding against potential misuse of technology or data.

The many names of citizen science

Citizen science is subject to different interpretations according to national, local and social contexts. Over the past decades many typologies, definitions, and criteria for qualifying citizen science have emerged, and there are a large number of terms that could fall under the citizen science umbrella. This has sparked discussions about what should be included.

Language barriers and translations

In citizen science new ethical issues arise, such as who decides, who participates,what it means to share power equally, or whose knowledge counts. It is also necessary to understand what are the methods of social and legal legitimation of citizen science practices, and how to harmonise them with existing procedures to regulate scientific activities, in particular ethical approval of research projects promoted by researchers.

Citizen science and the law

Citizen science touches upon legal questions, e.g. copyright and insurance. To enable successful citizen science, existing legal structures that regulate data analysis, archiving and data accessibility need to be adapted. Efforts should be made to foster ongoing discourse on legal and ethical issues pertaining to citizen science.

What is citizen science?

Citizen science, in general, means the participation of the public in science and research. It is an open and inclusive approach, with key characteristics including:
(1) citizens are actively involved in research;
(2) there is a genuine science outcome, such as new scientific knowledge, conservation action or policy change.

What does the term ‘citizen science’ mean?

The term ‘citizen science’ is broad and always changing, meaning that it is hard to narrowly define. A description from the European Commission:
“Citizen Science refers to the general public engagement in scientific research activities when citizens actively contribute to science either with their intellectual effort or surrounding knowledge or with their tools and resources.”

What are some of the benefits of citizen science?

Citizen science helps to make scientific research more democratic, inclusive and accessible. By involving a broader range of people, citizen science projects benefit from different kinds of knowledge and different sources of information, such as practical and experiential knowledge, and can generate a broader scale of data.

Who is involved in citizen science projects?

Citizen science projects can involve a range of participants, including civil society, public authorities, academia and industry, working together to contribute to scientific research and progress. Citizens from a diverse demographic and geographical range are at the core of citizen science projects. Anybody can join a citizen science project!

Which scientific fields are covered by citizen science and what is the geographical scope of a project?

Citizen science can take place in a diverse array of fields, including ecology, astronomy, biology, medicine, computer science, history, sociology. Historically, citizen science has been mostly applied within the field of natural sciences, but the scope and application of citizen science is constantly expanding. Citizen science can happen at different scales — from local to global, from short projects to those that occur over decades!

What is the eu-citizen.science platform and who is it for?

The eu-citizen.science platform serves as a knowledge hub, aiming to share knowledge, know-how, and experience between anyone doing or wanting to do citizen science. It is open to anyone interested in citizen science: practitioners, researchers, educators, communities and citizens, policy makers and funding bodies, decision makers, the press, and society as a whole.

Where can I find out more about citizen science projects?

There are multiple platforms and networks that facilitate access to different citizen science projects, including:
- eu-citizen.science platform
- Zooniverse platform
- Maptionnaire community engagement platform
- VERA (Virtual Ecosystem for Research Activation) platform
- World Engagement Map
- UK Citizen Science Network
- Citizen Lab community engagement platform

What motivates people to participate in citizen science?

People are empowered to participate in citizen science, for example because they gain a broader understanding of scientific processes and research. Citizen science provides an opportunity to get involved at every step of the research process and shape the policy discourse towards the issues and topics that matter to the people and their local communities.

What are the ‘10 Principles of Citizen Science’?

The ten principles provide a framework of standards to foster excellence in all aspects of citizen science. They were developed in 2015 by the ‘Sharing best practice and building capacity’ working group of the European Citizen Science Association, to set out some of the key principles which as a community we believe underlie good practice in citizen science.

Citizen science Principle 1: involvement

Citizen science projects actively involve citizens in scientific endeavours that generate new knowledge or understanding. Citizens may act as contributors, collaborators, or as project leader and have a meaningful role in the project.

Citizen science Principle 2: outcome

Citizen science projects have a genuine science outcome. For example, answering a research question or informing conservation action, management decisions or environmental policy.

Citizen science Principle 3: benefits

Both the professional scientists and the citizen scientists benefit from taking part. Benefits may include the publication of research outputs, learning opportunities, personal enjoyment, social benefits, satisfaction through contributing to scientific evidence e.g. to address local, national and international issues, and through that, the potential to influence policy.

Citizen science Principle 4: participation

Citizen scientists may, if they wish, participate in multiple stages of the scientific process. This may include developing the research question, designing the method, gathering and analysing data, and communicating the results.

Citizen science Principle 5: feedback

Citizen scientists receive feedback from the project. For example, how their data are being used and what the research, policy or societal outcomes are.

Citizen science Principle 6: democratisation

Citizen science is considered a research approach like any other, with limitations and biases that should be considered and controlled for. However unlike traditional research approaches, citizen science provides opportunity for greater public engagement and democratisation of science.

Citizen science Principle 7: open access

Citizen science project data and meta-data are made publicly available and where possible, results are published in an open access format. Data sharing may occur during or after the project, unless there are security or privacy concerns that prevent this.

Citizen science Principle 8: acknowledgment

Citizen scientists are acknowledged in project results and publications.

Citizen science Principle 9: impact

Citizen science programmes are evaluated for their scientific output, data quality, participant experience and wider societal or policy impact.

Citizen science Principle 10: ethics

The leaders of citizen science projects take into consideration legal and ethical issues surrounding copyright, intellectual property, data sharing agreements, confidentiality, attribution, and the environmental impact of any activities.

Who are the main stakeholders when it comes to citizen science?

Many different people and institutions can be involved in citizen science projects, including:
- Citizens
- Public authorities
- Industry
- Academia
- Funders

When was citizen science born?

The first use of the term "citizen science" can be found in a January 1989 issue of MIT Technology Review, which featured three community-based labs studying environmental issues.

How many citizen science projects exist?

There is no definite data. A recent study on the SciStarter database collected and analysed 2.346 projects. Of these, almost half (44%) are classified as “Ecology & Environment”, over 30% as “Biology”, 30% as “Nature & Outdoors”, and 25% as “Animals”. This shows the relevance of ecological and environmental sciences and that citizen science projects are mainly environmental-focused.

What is the level of participation?

Only 2.8% of the projects are Level 4, the extreme citizen science, when citizens are involved in the whole research process. The projects that present a higher output have the lowest participation (Level 2, distributed intelligence, when citizens gather data and interpret findings or categorise research material, or Level 1, crowdsourcing, when citizens offer time and gather data with devices).

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