The ones I am aware of and are frequently mentioned when such things are discussed on HN are: - https://onetreeplanted.org/ https://onetreeplanted.org/ - http

The ones I am aware of and are frequently mentioned when such things are discussed on HN are: - https://onetreeplanted.org/ https://onetreeplanted.org/ - https://trees.org/ https://trees.org/ In terms of concrete results the second one seemed like a likely candidate to me. Donating to them is unacceptable to me because they are based in the US and require a lot of personal information before they will accept a donation.