Which of the following are anthropogenic (human caused) sources of acid rain? question 20 options: volcano emissions, lightning, and microbial processes industrial emissions and motor vehicles smokestacks and volcano emissions microbial processes and fuel combustion

If we represent the solar system on a scale that allows us to walk from the sun to pluto in a few minutes, then a) the planets are microscopic and the stars are millions of miles away. b) the planets are the size of basketballs and the nearest stars are a few miles away. c) the planets are marble size or smaller and the nearest stars are thousands of miles away.