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Our work begins where rivers meet the sky and ends where groundwater feeds the soil. We use science to protect it all.

This work is possible because of volunteers like you. Learn how you can join.

Pollution doesn't stop at your neighbor's fence — and our solutions don't either. We work across industries to hold polluters accountable.

Join thousands of climate leaders organizing against pollution.

'Thirty years ago, this river was forgotten. Through their work, native fish are returning. I work alongside their team.' — Professor Chen

We believe that nature can heal if we give it the chance. Our decade of victories shows that grassroots action works.