Write a short paragraph about air pollution

Air pollution refers to the contamination of the atmosphere by harmful substances, including gases, particulate matter, and biological molecules. These pollutants can originate from natural sources like volcanic eruptions and wildfires, but are predominantly caused by human activities such as industrial emissions, vehicle exhaust, and the burning of fossil fuels. Exposure to air pollution can lead to various adverse health effects, including respiratory illnesses, cardiovascular problems, and even premature death, while also contributing to environmental issues like acid rain and climate change.