You may have heard about Ecosia, the tree-planting search engine. Some websites have claimed that Ecosia is fake or a scam, but this is completely false. There are loads of evidence that Ecosia is legit.
A Certified B Corporation is a business that meet[s] the highest standards of verified social and environmental performance, public transparency, and legal accountability to balance profit and purpose.(source)
Ecosia uses the ad revenue from web searches to plant trees.
Ecosia makes money every time someone clicks on an ad on the search results.
Every time someone searches on Ecosia, about 0.5 cents of ad revenue is generated on average.
Since it costs Ecosia an average of 22 cents to plant a tree, it takes about 45 searches (not 1!) to plant one tree with Ecosia.