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During the last 100 years we have produced a huge amount of carbon dioxide. The carbon dioxide in the atmosphere works like the glass in a greenhouse.Where does the carbon dioxide come from?People and animals breathe in oxygen, and breathe out carbon dioxide. Trees take carbon dioxide from the air, and produce oxygen. We produce carbon dioxide when we burn coal, oil, petrol, gas or wood. In the last few years people have burned huge areas of forest. This means there are fewer trees and of course, more carbon dioxide!

olegykoleg    3   01.06.2020 10:35    7