Tropical forests contain 50 percent of the world’s plant and animal species, contribute significantly to the advancement of science, medicine, and agriculture and produce much of the earth’s oxygen. The loss of these forests leads to the extinction of species, lessening the world’s biological diversity, reduces the potential for new medicines and crops and increases carbon dioxide levels in the atomosphere
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So in original. Probably should be “atmosphere”.
contributing to the greenhouse effect that is altering the global climate.