Air pollution is considered a problem because it not only affects the environment but also damages crops, forests, animals, and the human body. The causes of air pollution contribute to the problem of acid rain and the depletion of the ozone layer. The ozone layer is important for the earth because it protects the earth from the UV rays of the sun. But when it gets depleted, the UV rays can enter the Earth and affect humans. In this way, the air problem creates problems.