Some people prefer Google when exploring the Web. Some like Yahoo or Bing. But now more than 2.5 million people a month are using Ecosia, because every time they click “Search” they help plant a tree. Ecosia donates an impressive 80 percent of its income, after expenses, to programs that sows trees in Africa. The money, up to $75,000 a month (most of it from ads), is responsible for four new trees every minute, according to Ecosia spokesperson Jacey Bingler.