Which row identifies a cause and an effect of eutrophication?
- Acause: the overuse of insecticides; effect: an algal bloom in ponds and streams
- Bcause: the release of fertilisers; effect: acidification of the atmosphere
- Ccause: the release of oxides of nitrogen; effect: warming of the atmosphere
- Dcause: the release of sewage; effect: anaerobic conditions in ponds and streams