Pesticides ruin ecosystems. Primarily the food chain. Pesticides do not degrade into less harmful components and dissipate with time. Pesticides climb the food chain through a process called biomagnification. For example, pesticides are sprayed onto plants to deter or eliminate pests such as insects and rodents. Some pests are not exposed to lethal doses of pesticides are therefore still exist with in the community. These creatures are then consumed by tiers of predators. By the time pesticide concentrations reach higher levels of the food chain it will have multiplied by several times, thus increasing the harmful effects. Aside from affecting the food chain directly, excess pesticide leaks into surrounding soil, water systems, and ground water reservoirs. This spread in effect affects adjacent communities and ecosystems.
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