Emissions can be categorized based on their sources, which include anthropogenic (human-made) and natural sources. Industrial emissions from factories and power plants are significant contributors, releasing a variety of harmful substances, including heavy metals and volatile organic compounds (VOCs). Another major source is vehicle emissions, primarily from the combustion of fossil fuels, which release carbon monoxide, NOx, and other pollutants. Natural sources include wildfires and volcanic activities that release particulates and gases into the atmosphere.
