pesticide
Definition
Chemical or biological substance designed to kill or retard the growth of pests that damage or interfere with the growth of crops, shrubs, tress, timber and other vegetation desired by humans. Practically all chemical pesticides, however, are poisons and pose long-term danger to the environment and humans through their persistence in nature and body tissue. Most of the pesticides are non-specific, and may kill life forms that are harmless or useful.
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