The key concept of the paragraph is the issue of deforestation and its impact on the environment. The author develops this concept by first establishing the extent to which forests cover the Earth and then highlighting the concerning trend of rapid deforestation. They detail the causes of deforestation, distinguishing between natural causes, such as fires, and human-driven causes, such as land clearing for agriculture or logging for raw materials. By concluding that the economic benefits do not outweigh the environmental costs, the author further underscores the importance of forests for ecological balance, signaling that deforestation's negative consequences surpass the immediate economic gains.
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