You’re still using Google, but results are piped via Ecosia, who use the money from the adverts (same amount as Google) to fund rainforest protection. Brilliant, easy, simple. Takes about 2 minutes to make it your default search engine.
“Each web search saves about 2 m² of rainforest for free. We already protected 186,443,380 m².”
Take 2 minutes now to do it: Ecosia.