Ecosia: The eco-friendly search engine

Ecosia is a environmental-friendly search engine that saves the rainforest while your're searching the web. At least 80% of their search income goes to a rainforest protection program run by WWF, which uses this money for the sustainable protection of rainforests in the Juruena National Park in Brazil.

It saves 2m² of rainforest with each web search you do. Their search results are as good as Google or Yahoo. So far (28.1.2010) Ecosia has saved 18,795,321 m² (22,479,204 yd²) of rainforest. They're not running any servers powered by alternative energy yet though. None the less I suggest you make it your browser's default start page!