Question

What are pesticides? Explain sources and pathways of pesticide pollution.

Answer 1

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A chemical substance that is used for killing animals, especially insects, that eat food crops.

SOURCES⏺⏺⏺

Ground water--the unseen resource--is the source of drinking water for more than 50 percent of the Nation. As water seeps through the soil, it carries with it substances applied to the land, such as fertilizers and pesticides.

PATHWAYS⏺⏺⏺

Pesticides are often found in rivers or streams but also in the groundwater. Residues from pesticides have even been found in rain. The risk of unwanted spread of pesticides to the environment is mainly related to cropping and spraying techniques and also to natural conditions and processes.

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Answer 2

Pesticides can contaminate soil, water, turf, and other vegetation. In addition to killing insects or weeds, pesticides can be toxic to a host of other organisms including birds, fish, beneficial insects, and non-target plants.

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