Giving guide
Where to give in environment
Environmental charities protect ecosystems and tackle climate change through conservation, clean-energy advocacy, and pollution reduction. The most effective focus on high-leverage work — policy change, protecting critical habitat, and cutting the most harmful emissions.
The charities below are ranked by our composite GiveWise score, which reflects independent ratings, financial efficiency, and transparency of results.
The ranking
Top Environment charities
5 organisations, ranked by GiveWise score. Each links to a full profile with its rating breakdown, financials, and a donate link.
1Environmental Defense FundScience-based environmental advocacy: climate, ocean health, and ecosystem protection84Score86%To programs
2The Nature ConservancyScience-driven land and water conservation across 72 countries83Score87%To programs
3Clean Air Task ForcePolicy and technology advocacy targeting the highest-leverage climate and air pollution solutions82Score90%To programs
4Rainforest AllianceCertification, farmer training, and supply-chain sustainability to protect tropical forests81Score84%To programs
5Sierra Club FoundationGrassroots advocacy and litigation protecting wild places and clean energy transition79Score82%To programs
FAQ
Frequently asked questions
Which environmental donations have the biggest impact?
Charities that work on policy and systemic change — clean-air regulation, decarbonisation, and protecting large or biodiverse areas — often achieve more per dollar than smaller local projects, because their wins scale.
How do I avoid greenwashing?
Look for charities that publish concrete, measurable goals and independent evaluations, rather than vague pledges. Every organisation below links to its evaluator record.