Just back from a screening in Vienna, where one of the members of the audience made me aware of Ecosia, a search engine that uses its profits to plant trees.
I'm always eager for new ways to personally mitigate climate change, so I leaped at this. I've been using Ecosia today and loving it. I see no reason to use anything else, frankly.
Oh and they don't have any third party trackers, and they don't sell your data to advertisers, it is claimed.
Happy searching/tree planting!