water pollution

2. a place or period in which nothing happens or in which no life exists.
8. consist of active ingredients, which are combined with additional materials (excipients) selected to control dosage delivery, enhance performance and facilitate manufacture.
9. a source of pollution that issues from widely distributed or pervasive environmental elements.
11. an infective agent that typically consists of a nucleic acid molecule in a protein coat, is too small to be seen by light microscopy, and is able to multiply only within the living cells of a host.
14. a synthetic material made from a wide range of organic polymers such as polyethylene, PVC, nylon, etc., that can be molded into shape while soft and then set into a rigid or slightly elastic form.
15. the action or habit of consuming alcohol.

1. a chemical or natural substance added to soil or land to increase its fertility.
3. a salt or ester of phosphoric acid, containing PO43− or a related anion or a group such as —OPO(OH)2.
4. excessive richness of nutrients in a lake or other body of water, frequently due to runoff from the land, which causes a dense growth of plant life and death of animal life from lack of oxygen.
5. a salt or ester of nitric acid, containing the anion NO3− or the group —NO3.
6. occurs when human water pollution speeds up the aging process by introducing sewage, detergents, fertilizers, and other nutrient sources into the ecosystem.
7. a member of a large group of unicellular microorganisms which have cell walls but lack organelles and an organized nucleus, including some that can cause disease.
10. a substance used for destroying insects or other organisms harmful to cultivated plants or to animals.
12. a single identifiable localised source of something.
13. water that has been used in the home, in a business, or as part of an industrial process.