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Plants draw up minerals in solution from the soil in which they grow- carbon, nitrogen, phosphorous, hydrogen, oxygen, and in some cases sulphur. They also need water for the oxygen it contains. These are all taken in from their roots, but in addition to this, they also absorb carbon dioxide through their leaves. This is converted into glucose via the green pigment in the plant's leaves (called chlorophyll) using a process called Photosynthesis. Oxygen is given out by the plant as a 'waste' product- which in turn, we need to be able to breathe! Thus, plants and trees are essential for the maintenance of life on Earth- without them, there would be no Oxygen. Plants themselves also need a small amount of oxygen, too.

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16y ago

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