Envirofit
Envirofit International is an organization striving to reduce small scale source pollution in developing countries in two ways. One being cheap, efficient cooking stoves that drastically cut both the amount of resources used for heating and food preparation and the amount of indoor air pollution. The second way has been to develop and produce a 2-stroke engine retrofit which will reduce the direct output of petroleum and other pollutants into the air for the communities and countries, such as Indonesia and India, which rely heavily on the vehicles these engines power. You can find out more at envirofit.org.