žprimary pollutants are substances directly emitted from a process, such as ash from a volcanic eruption
Friday, July 16, 2010
Air pollutants
žAn air pollutant is known as a substance in the air that can cause harm to humans and the environment. Pollutants can be in the form of solid particles, liquid droplets, or gases. In addition, they may be natural or man-made.
žPollutants can be classified as either primary or secondary.(Note that some pollutants may be both primary and secondary)
What is air pollution?
žAir pollution is the introduction of chemicals, particulate matter, or biological materials that cause harm or discomfort to humans or other living organisms, or damages the natural environment into the atmosphere.
žThe things that pollute the air are called air pollutants
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