As the human population increases, the amount of food production becomes most important. There are other organisms that destroys the crops that are meant for humans. In United States alone, it is estimated that nearly 37% of all crops produced each year are destroyed by agricultural pests, which results in an economic loss of around $122 billion a year.
The key benefits of pesticides are:
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Produce more in less land,
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Increase profits for farmers
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Keep food cost affordable
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Prevent diseases such as malaria, Lyme disease, West Nile virus etc.
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Help conserve the environment by enabling farmers to produce more crops per unit area, thus reducing deforestation.
Due to the use of pesticides, it is possible to combat pests and produce larger quantities of food for growing population. The high yield of crops also lead the farmers to gain more profits by having more produce to sell. Pesticides also increase farm profits by helping the farmer save money on labor costs.