Some rather unknown examples or at least rarely used examples for this are "green" or CO2-neutral servers and online services. For search engines, there are several alternatives:
- Forestle promises to enable its partner, the US based organisation "The Nature Conservancy" to reforest 0.1 m^2 of rain forest for every search.
- Ecosia supports the WWF in protecting rain forest in Brasil, on average about 2 m^2 per search
The backend of forestle and ecosia is provided by Bing and Yahoo. The operator for both is a for-profit organisation located in Berlin, Germany, which is bound by contract to invest at least 80% of its earnings in these rain forest projects.
- znout doesn't support anyone, but buys enough CO2-certificates to green-ify the power used by the servers in the search process. Its also the only search engine that uses google (the custom search provided by google)
- GoodSearch offers you to choose a US-based charity to give the money to - on average 0.01 USD per search. It features, among many others, amnesty international and the Richard Dawkins Foundation for Reason and Science. Its again a front-end to Yahoo search technology.