Define groundwater pollution. Describe the sources and impact of groundwater pollution.

Groundwater pollution refers to the contamination of underground water sources, such as aquifers and wells, by harmful substances. These contaminants can originate from various human and natural activities, leading to a decline in water quality, which is essential for drinking, irrigation, and industrial purposes. Groundwater is generally considered a cleaner source of water than surface water, but its susceptibility to pollution has become a significant concern due to increasing human activities.

Sources of Groundwater Pollution:

1. Agricultural Runoff: One of the primary sources of groundwater pollution is agricultural runoff, which contains pesticides, herbicides, and chemical fertilizers. These chemicals can percolate through the soil and reach underground water sources, ___ _________ _______ __________ _________.
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