Colorado mountains bouncing back from 'acid rain' impacts

Niwot Ridge in the Rocky Mountains is slowly recovering from increased acidity caused by vehicle emissions in Colorado's Front Range, suggesting that alpine regions across the Mountain West may be recovering. This is good news for the wildlife and wildflowers of Rocky Mountain National Park and for water sources that supply the Front Range and the Mountain West.

source https://www.sciencedaily.com/releases/2020/12/201208193353.htm