Pesticides
chemical used to kill pests
Biological control
use of another organism to control the numbers of pests
Bioaccumulation build
up of pollutants in fatty tissues of an organism
Biomagnification
increase in concentration of bioaccumulated substances along food chain
Pollution
contamination of environment by harmful substances produced by humans
Acid rain
rain with a pH less than 5.5, caused by pollutant gases (sulphur dioxide, nitrogen oxides)
Tropical rainforests
forests around tropics and equator, have high rainfall and biodiversity
Eutrophication
process where aquatic habitat gets lots of minerals
Leaching
process where mineral ions are washed out of soil by rain
Algal bloom
rapid increase in numbers of algal cells in aquatic habitat, often caused by eutrophication
