Air pollution is the contamination of air due to the presence of substances in the atmosphere that are harmful to the health of humans and other living beings, or cause damage to the climate or to materials. It is also the contamination of indoor or outdoor surrounding either by chemical activities, physical or biological agents that alters the natural features of the atmosphere. There are many different types of air pollutants, such as gases (including ammonia, carbon monoxide, sulphur dioxide, nitrous oxides, methane, carbon dioxide and chlorofluorocarbons), particulates (both organic and inorganic), and biological molecules. Air pollution can cause diseases, allergies, and even death to humans; it can also cause harm to other living organisms such as animals and food crops, and may damage the natural environment (for example, climate change, ozone depletion or habitat degradation) or built environment (for example, acid rain).  Air pollution can be caused by both human activities and natural phenomena.
Please list the harm that air pollution caused based on the given passage.
1.	Air pollution is caused by the presence of harmful substances in the air, it can cause damage to human health, living beings and climate.
2.	Air pollution can cause diseases, allergies and even death to human, it can also harm animals, food corp and the nature.
3.	Air pollution can harm the natural environment by climate change, ozone depletion, habitat degradation ,acid rain.