Environmental progress, one branch per day
This tree only thrives when the planet does. Contribute code to open source projects driving real environmental change, or donate to the most credible and cost-effective climate organizations in the world.
These organizations have been rigorously evaluated for cost-effectiveness by independent charity evaluators. Every dollar goes further here.
Open source projects making real-world environmental impact. Contribute code, data, or documentation — every commit counts.
Research, curated data, and resources to understand the climate crisis and find where your skills or dollars have the highest leverage.