The largest sources of human-created air pollution are energy generation, transportation, and industries that use a great deal of energy resources. Depending on their source and interactions with other components of the air, they can have different chemical compositions and health impacts. Fires are another major source of air pollution and can lead to severe problems if the smoke is inhaled for a period of time.
The air you breathe effects every part of your body. Immediately, breathing toxic air can cause shortness of breath and irritation in your nose and throat. People who suffer from allergies and asthma are especially affected by these problems. Pollution can also aggravate already existing health problems for chronically ill and elderly individuals. Some toxic chemicals can be even more severe. Long-term exposure can cause cancer, birth defects, nerve damage, lung injury, and more.