 The hydro schemes also cut greenhouse gas emissions, by virtually eliminating the use of kerosene lighting, cutting the use of diesel generators, and also reducing the use of unsustainable wood.A detailed breakdown has not been made of fuels replaced, but an indication of the significance can be made by assuming that the estimated 110,000 MWh of electricity generated each year replaces diesel generation producing around 0.8 tonnes of carbon dioxide per MWh.This suggests a substantial greenhouse gas saving of around 88,000 tonnes of carbon dioxide per year.