The earth is surrounded by an atmosphere, which traps greenhouse gases, such as Carbon Dioxide (CO2) and Methane (CH₄). Before the 18th Century, these greenhouse gases ensured that the earth was the perfect temperature for life. In the 18th century, the Industrial Revolution began. Humans started burning fossil fuels such as coal, natural gas and oil to run factories, trains and cars. Burning fossil fuels produces more greenhouse gases which go into the atmosphere and act like a greenhouse, warming up the earth. The more greenhouse gases we put into the atmosphere, the warmer the world will get.
Fossil fuels include coal, natural gas and oil. We burn fossil fuels as petrol and diesel in cars, kerosene in aeroplanes, oil in ships and natural gas, coal and oil to make electricity. When fossil fuels are burned they let out greenhouse gases which go into the atmosphere. You can make a difference by walking, cycling or taking public transport instead of going by car.