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…showed last 75 words of 883 total…leukemia. This is one reason why rainforests are urgently needed for further research before they are gone. Another reason why rainforests are needed is to help maintain a balance in our biosphere. The plants in the rainforest store huge numbers of carbon inside themselves. When they are burned, the carbon is released as carbon dioxide and when burned at alarming rates the balance in Earth's atmosphere tips and helps support the greenhouse problem develop further.