The theme for Earth Day 2020 is climate action. The enormous challenge — but also the vast opportunities — of action on climate change have distinguished the issue as the most pressing topic for the 50th anniversary.
Climate change represents the biggest challenge to the future of humanity and the life-support systems that make our world habitable.
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.