Air pollution is gathered in clouds and when it reacts with the oxygen and water in the atmosphere it becomes acid. The winds carry the polluted clouds long distances. When it rains, this pollution falls on trees, houses, buildings, cars, clothes, everywhere!!! This called acid rain.
Question: Which is the topic?
Select one:
a. The water and soil pollution
b. The pollution
c. The solutions
d. The air pollution and acid rain