What is the source of energy in homes?
Fossil fuels such as coal and natural gas are the source of most energy in homes. Natural gas can be used to heat water and warm living space. Sometimes electricity is used in place of natural gas for heating. Electricity is used by air conditioners to cool homes. Coal (and increasingly natural gas) is burned in power plants run by utilities to produce electricity used in homes. While renewable sources of energy such as wind power can produce electricity for homes, the vast bulk of residential energy still comes from fossil fuels that release pollutants such as nitrous oxides, sulfur dioxides, and mercury.
