Natural gas is a fossil fuel formed when layers of buried plants
and animals are exposed to intense heat and pressure over thousands
of years. The energy that the plants and animals originally
obtained from the sun is stored in the form of carbon in natural
gas. Natural gas is combusted to generate electricity, enabling
this stored energy to be transformed into usable power. Natural gas
is a nonrenewable resource because it cannot be replenished on a
human time frame.
