Theory question 307
Environmental Hazards and Conservation(a) List five sources of water pollution. (b) Highlight five measures that can be taken to control water pollution.
Show the model answer
Model answer
(a) Industrial effluents; oil spills; sewage and human waste; refuse dumped into rivers and drains; fertilisers and pesticides washed from farms; mining wastes; hot water from power stations (thermal pollution); dead animals; acid rain.
(b) Treat industrial waste and sewage before discharge; laws and penalties against polluters; proper refuse disposal and recycling; control of oil spills and pipeline vandalism; controlled use of fertilisers and pesticides; public education; regular monitoring of water quality; provision of toilets and drainage.
Explanation
Five distinct points in each part.