Air and Water Pollution | What you can't see…
What you can't see…
Air is essential for life on Earth. It provides oxygen for animals and carbon dioxide for plants. It encircles Earth to form its atmosphere, protecting the planet against harmful rays and causing its weather. Air pollution comes in the form of gases—such as nitrogen dioxide, sulfur dioxide, and carbon monoxide—as well as solid and liquid particles called particulate matterSolid matter in the form of tiny particles in the atmosphere. (Pronounced par-TIK-you-let.). Measuring about 0.0001 inch (0.0025 millimeters, also called 2.5 microns) in diameter, particulate matter is small enough to be suspended, or float, in the air.
There are several major categories of air pollution produced by humans. Pollutants include the gases nitrogen dioxide, sulfur dioxide, and carbon monoxide, along with lead pollution and particulate matter.
Gases: In...
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