Natural gas is hard to describe... because it is colourless, odourless and shapeless! It is a combination of several gases such as propane, butane, carbon dioxide, ethane, oxygen, nitrogen and hydrogen sulphide, but is primarily made up of methane gas.

Natural gas takes millions of years to form deep in the Earth.

When micro-organisms, sea plants and animals died over 300 million years ago (even before the dinosaurs!), they settled on the bottom of the oceans. Layers of dead sea plants, animals, sand, mud and other debris built up over time and were subjected to the pressure and heat from the Earth which turned them into petroleum and natural gas.

The natural gas would become trapped in pockets between underground rocks. Sometimes the gas would rise up to the Earth's surface and disappear into the air or even ignite from lightning strikes.

Natural gas is a popular fuel choice because it burns more cleanly, more brightly and at a higher heat than do other fossil fuels like coal and oil. It is used to cook food, heat buildings and even to help produce electricity.