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Which of the following is regarded as the main cause of groundwater contamination? 

(a) agricultural products

(b) landfills 

(c) septic tanks 

(d) All of the above main sources of groundwater contamination.

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Correct option: (d) All of the above main sources of ground water contamination.


Materials from land’s surface can travel through the soil ultimately reaching the groundwater. For example pesticide and fertilizers can enter into the ground water supplies. Untreated waste from septic tanks and toxic chemicals from underground storage tanks and leaky landfills can also contaminate groundwater.

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