3. What is soil pollution? As defined by the World Health Organization (WHO), the "environmental pollution is the introduction of hazardous wastes environment or energy to the extent of the negative impact on the lives of creatures, human health or degrade the quality of the environment". The soil is considered contaminated when the concentration of toxins rises excessively, beyond the ability of self-cleaning land environment.Land pollution is considered all phenomena making environmental contamination of soil by the contaminants. One can classify the soil contaminated by the source arises, or the cause of the pollution.
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