Pesticides

Pesticides

Any chemical or substance used to kill or inhibit the growth of pests that damage or interfere with the growth of crops, shrubs, tress, timber and other vegetation useful to humans.

Industry: Agricultural chemicals

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Pesticides

spring melt/thaw

Agricultural chemicals; Pesticides

The process whereby warm temperatures melt winter snow and ice. Because various forms of acid deposition may have been stored in the frozen water, the melt can result in abnormally large amounts of ...

stabilization ponds

Agricultural chemicals; Pesticides

(See: lagoon.)

stable air

Agricultural chemicals; Pesticides

A motionless mass of air that holds, instead of dispersing, pollutants.

stack

Agricultural chemicals; Pesticides

A chimney, smokestack, or vertical pipe that discharges used air.

stack effect

Agricultural chemicals; Pesticides

Flow of air resulting from warm air rising, creating a positive pressure area at the top of a building and negative pressure area at the bottom. This effect can overpower the mechanical system and ...