A decline in the health of forests in Germany has been attributed to A) erosion caused by excessive lumber cutting. B) acid rain. C) increased CO₂ concentrations and global warming. D) urbanization.

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Acid rain, which is caused by air pollution, has led to a decline in the health of forests in Germany and other areas. The acid rain damages the leaves of the trees, disrupts nutrient uptake, and weakens the trees, making them more vulnerable to pests and diseases.

A Decline in the Health of Forests in Germany Has