3. The unwanted or harmful substance is called as
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Toxic waste is any unwanted material in all forms that can cause harm (e.g. by being inhaled, swallowed, or absorbed through the skin). ... Disposing of such waste is a major public health issue..
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It contaminates both the air and water with toxic substances. An unwanted and harmful substance that contaminates the environment is called a pollutant. ... Sewage, fertilizers, pesticides and industrial wastes are pollutants of the water.
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