Every 24 hours around the world millions of litres of oil or by-products of oil is burnt.
Every litre produces greenhouse gases that are harmful to the Earth and humans.
This gas works just like the glass in a greenhouse. It keeps the heat in and doesn't let it escape. We have already seen the effects of global warming. The el-nino effect is one example. Too much of this gas will eventually result in the polar ice caps melting and the Earth flooding.