Natural gas is used in many homes to fuel furnaces, stoves, cookstoves and preparing domestic hot water. It’s relatively easy to be delivered to your home (if you have a natural gas pipeline near), very easy to use and clean to burn. Burning natural gas produces almost only water vapor and carbon dioxide, with small amounts of nitrogen oxides, but virtually no sulphur oxides. It is used as a feedstock for fertilizer production and many chemical syntheses, as it contains mostly methane.
Here’s a good article about this fuel — it’s origin, uses and future.