Air pollution is when humans put toxic chemicals or smoke into the air. This can make our air dirty. This can lead to breathing problems for humans and other animals. Plants can also be harmed because the air that they bring in is not clean. This is a very big problem in big cities and a leading cause of Climate Change. Climate Change is when gases, like Carbon dioxide, go up into Earth’s atmosphere and trap in sunlight. The atmosphere has to be balanced with gases, but with air pollution, the gases in the atmosphere are imbalanced. This is very bad for the health of the Earth. Humans can help by not burning things to create gases like Carbon dioxide.