I do believe that it is both naturally occurring and caused by human activity. Although science has proven that it is something that naturally progresses with time, humans have sped up the process. Hope this helps:)
Its D I Just Took The Test
Answer:
C) Scrubbers remove sulfur from the smoke of coal power plants.
Explanation:
Well most scrubbers in North America (U.S) coal plants are used to remove sulfur emissions from coal and lessen the formation of acid rain.
Exposure to infrared light can heat the lens of the eye and produce cataracts over the long term.
Cerebellum is part that helps us keep from falling.
