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Become a Citizen Scientist

Use the Earth Challenge 2020 app to gather critical environmental data near you

Earth Challenge 2020 is the app fueling the world’s largest citizen science effort, available on Android and iOS devices.

Earth Challenge lets you gather important scientific data near you. It has two elements for you to measure — air quality and plastic pollution — with more on the way.

Get the app to join other citizen scientists today.

get the earth challenge 2020 app:

Uniting on Earth Day despite social distancing

As the 50th anniversary of the first Earth Day, Earth Day 2020 was already going to be a historic event. COVID-19 and social distancing has forced us apart, but we’re still an interconnected entity that will operate digitally as one to create change. 

Without leaving home, millions of users can record the quality of the air outside their window. Users can take readings throughout the day to track how human activity and weather patterns change the air we breathe. Each reading will add to a global database of knowledge and help us understand how our world works and how we can protect it. 

We may not be able to come together in person this Earth Day, but we have the tools, the people and the passion to come together through Earth Challenge 2020.



Become a citizen scientist — 
Download the Earth Challenge 2020 app today

Join the world’s largest citizen science initiative

Earth Challenge 2020