Q: Fact 1: Gases from burning coal and oil dissolving in water in the atmosphere causes acid rain. Fact 2: Coal-fired power plants contribute to acid rain. Given the two facts above, what can power plants cause?

Available options:
a). Pesticides
b). wind
c). heat energy
d). acid rain
e). friction
f). Pollution
g). coal
h). oil
A:
d).