Ether Tree

Ether Tree, the carbon negative NFT collection. 100% of all proceeds are used on accredited, certified carbon off-set schemes.
Every time an ether tree is traded more carbon is offset than is used for that transaction on the blockchain. Ether trees eat carbon just like real ones.
All proceeds from sale and all royalties go to carbon off-set. The team makes no money whatsoever. Not a single wei. The funds for the contract deployment and initial mint, together with the carbon credits to off-set deployment and mint, are our donation. All time spent on the project is 100% donated.)

See https://ethertree.org/ for more details.