In high-elevation forests in Pennsylvania, ecologists have noticed a serious decline in certain tree species. Some scientists
propose that increased soil acidity might be the cause. What's this
phenomenon?

The loss of trees and other vegetation can cause climate change, desertification, soil erosion, fewer crops, flooding, increased greenhouse gases in the atmosphere, and a host of problems for indigenous people.

Explanation:

Explanation:

Acid rain , which is caused by SO 2 from combination mixed with atmosphere water vapor

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