The Earth is heating up … The sun’s rays hit the ground and turn into heat that radiates out from the Earth’s surface. Greenhouse gases stop this heat radiation from disappearing out into space. When the level of greenhouse gases in the atmosphere increases, more heat gets left behind and the Earth’s temperature rises.
Some important greenhouse gases are carbon dioxide (CO2) and methane gas (CH4). Additional carbon dioxide is released mainly by cars, coal and oil fires, factories and aircraft. Developed countries in the northern hemisphere produce the most emissions. China also generates a huge amount of carbon dioxide. As the Earth heats up, it affects all countries and people, especially children.
Cars driven on fossile fuels such as petrol, release a lot of carbon dioxide into the atmosphere. Photo: Biofriendly CC BY 2.0
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