water poluution

2. kill, repel, or control forms of animal and plant life considered to damage or be a nuisance in agriculture and domestic life.
3. 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.
6. all the different kinds of life you'll find in one area
12. a substance that provides nourishment essential for growth and the maintenance of life.
13. the presence in or introduction into the environment of a substance or thing that has harmful or poisonous effects.
14. a colorless, transparent, odorless liquid that forms the seas, lakes, rivers, and rain and is the basis of the fluids of living organisms.
15. the amount of oxygen that is present in water

1. emitting or relating to the emission of ionizing radiation or particles.
4. having been made impure by exposure to or addition of a poisonous or polluting substance.
5. a large natural stream of water flowing in a channel to the sea, a lake, or another such stream.
7. 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.
8. a compound or substance that has been purified or prepared, especially artificially.
9. a living organism of the kind exemplified by trees, shrubs, herbs, grasses, ferns, and mosses, typically growing in a permanent site, absorbing water and inorganic substances through its roots, and s
10. a disorder of structure or function in a human, animal, or plant, especially one that has a known cause and a distinctive group of symptoms, signs, or anatomical changes.
11. a living organism that feeds on organic matter, typically having specialized sense organs and nervous system and able to respond rapidly to stimuli.