What type of pollution involves harmful substances in the atmosphere?

Air pollution involves the presence of harmful substances in the atmosphere, which can include gases, particulate matter, and biological molecules that can be detrimental to health and the environment. These substances can originate from various sources, such as vehicle emissions, industrial discharges, and natural events like wildfires or volcanic eruptions. The impact of air pollution extends to human health, contributing to respiratory diseases, cardiovascular problems, and other health issues, as well as environmental effects like climate change and acid rain. This understanding of air pollution highlights its significance as a major environmental concern over the other types listed, which pertain to pollution of water bodies, land contamination, or noise disruption.