Answer the following question given this paragraph: 

Besides pathogens, many other dangers in the environment may negatively affect human health. For example, air pollution can cause lung cancer. It can also make asthma and other diseases worse. Bioterrorism is another potential threat in the environment. It may poison large numbers of people or cause epidemics of deadly diseases. But the worst thing you can do to yourself is smoke cigarettes.


Q: Which pollution can cause lung cancer and can also make asthma and other diseases worse?


A:
air pollution