What has caused global warming?

Global warming is caused by many things such as: the burning of fossil fuels, carbon dioxide, methane gas and CFC’s. All these things contribute to global warming. The world produced up to 28 billion tonnes of carbon dioxide last year; which means that the layer of the gases in the atmosphere is thickening; which is making our Earth a whole lot warmer. Even all the rubbish (pictured) lets of greenhouse gas emmisons- which has also contributed to global warming.

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