the smoke contains dust and the chemical into the atmosphere. Examples of carbon monoxide, sulfur dioxide, chlorofluorocarbons (CFCs), and nitrogen oxide by industry and vehicles occurs when the surface water flows through the garbage, waste water, industrial pollutants on the ground, and then seep into the groundwater.occurs when the soil was contaminated with the toxic chemical substances (concentrations exceed the limits normally) due to the proactive activities of people such as mining, industrial manufacturing, using chemical fertilizers or pesticides so much ... or due to leaking from the reservoirs
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