Natural gas is also used for cooking food on gas stoves. Oil is made into gasoline, which powers cars and other vehicles. Oil is a thick, brown or black substance found in rocks below Earth's surface. Natural gas is often found in the same places. Both oil and natural gas formed from the rotting remains of tiny sea creatures that lived millions of years ago.
Water is a renewable resource.
Water can be used over and over again, but it is never used up. Air, like water, is a renewable resource. Air is a mixture of gases.