Eutrophication

Eutrophication is a leading cause of impairment of many freshwater and coastal marine ecosystems in the world. It takes place when the environment becomes enriched with nutrients. This can be a problem in marine habitats such as lakes, ponds, rivers and sometimes in seas, as it can cause algal blooms. Fertilisers are often used in farming; sometimes these can run-off into nearby water causing an increase in nutrient levels.