Barefoot engineers have also helped electrify 35,000 houses with solar energy in 1,000 villages in 37 countries, saving 4.6 million litres of kerosene from polluting the environment. Since 1986, Barefoot engineers have helped collect rainwater in 901 schools in remote villages in India as well as Afghanistan, Ethiopia, Mauritania, Senegal, The Gambia, Sierra Leone and Mali, providing water for drinking and sanitation to 2.65 million rural children. In addition, 1,513 rainwater harvesting structures have been built in rural schools and community centres with a total capacity of 96.65 million litres of water every year.