Pollution

1. One of the biggest copper mines in Chile.
2. Addition to the biosphere of a substance or an agent by human activity, ata rate greater than that at which it can be rendered harmless by the environment.
3. It is made up of three oxygen atoms.
5. Release of pollutants from a single, clearly identifiable site.
7. Characteristic of a specific place.
9. Addition of excess nutrients to a freshwater ecosystem, usually nitrates and phosphates.
11. ________species, are only found if the conditions are either polluted or unpolluted.
12. Material which has no value to its producer.
13. Waste is taken to this site and buried there.
14. A measure of the amount of dissolved oxygen required to break down the organic material in a given volume of water through micro-organisms.
16. These burn the waste at high temperatures of up to 2000°C.
19. Used for malarial control. Banned in many countries.

1. Developed during the 1930's, we abbreviate them CFC's.
4. Release of pollutants from numerous, widely dispersed sources.
6. Oxygen-deficient water.
8. Measurements that record changes in an abiotic or biotic factor which are the result of the pollutants.
10. _______ Spring, book that discusses the effect of DDT on eggshells of birds of prey.
15. Measurements that record the amount of a pollutant in water, air or soil.
17. Reduce, re-use, _________.
18. To set and impose standards.