Changes

'''Catchments''' are assemblages used to capture and retain rainwater and runoff; an important water management technique in areas with limited freshwater resources, such as Gibraltar. DDT (dichloro-diphenyl-trichloro-ethane) - a colorless, odorless insecticide that has toxic effects on most animals; the use of DDT was banned in the US in 1972.

'''Catchments''' are assemblages used to capture and retain [[rainwater]] and runoff; an important water management technique in areas with limited [[freshwater]] resources, such as [[Gibraltar]].  

[[Category:Environment]]

[[Category:Ecology]]