Kids Research Express

The major water pollutants are chemical, biological, or physical materials that degrade water quality. Pollutants can be classed into eight ...

Soil is a mixture of mineral, plant, and animal materials that forms during a long process that may take thousands of years. It is necessary...

Solid wastes are unwanted solid materials such as garbage, paper, plastics and other synthetic materials, metals, and wood. Billions of tons...

Hazardous wastes are solid, liquid, or gas wastes that may be deadly or harmful to people or the environment and tend to be persistent or n...

Unwanted sound, or noise, such as that produced by airplanes, traffic, or industrial machinery, is considered a form of pollution. Noise pol...