Coal gas

Coal gas is a type of gas that is made from coal, which is a black rock that is really old and comes from underground. The gas is made by heating the coal in a special way, which turns it into a gas that can be used for lots of things.

Coal gas is really useful because it can be used to make things like electricity, heat homes and buildings, and even power cars and trucks. It can also be used in factories and other large buildings to run big machines and equipment.

But, coal gas can be dangerous if it's not used properly. The gas can sometimes leak out of pipes and cause explosions or fires, which can hurt people and damage buildings. So, it's very important to take safety precautions when using coal gas.

Overall, coal gas is a really important resource that can help us do lots of things, but we need to be careful when using it.