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DSST Environmental Science
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DSST Environmental Science
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1. Requires the EPA to set national ambient air quality standards for pollutants considered harmful to public health and the environment.

2. Is dealt with the secondary treatment phase when it becomes activated -----. It is then treated for disposal using anaerobic - aerobic or other means.

3. A very week direct greenhouse gas but has important indirect effects on global warming. Reacts with hydroxyl (OH) radicals in the atmosphere - reducing their abundance. As OH radicals help to reuse the lifetimes of strong greenhouse gasses - like met

4. Current world population growth

5. A nuclear accident that occurred on April 26 - 1986 at the Chernobyl Nuclear Power Plant in Ukraine (then the Ukrainian Soviet Socialist Republic - part of the Soviet Union). It is considered the worst nuclear power plant accident in history and is t

6. Obtain nutrients by eating dead and rotten things. Ex- earthworms

7. Begins in areas where the soil is already present

8. What country is the biggest producer of Hazardous waste?

9. A process by which radioactive energy leaving a planetary surface is absorbed by some atmospheric gasses called greenhouse gasses. They transfer this energy to other components of the atmosphere and it is re-radiated in all directions - including bac

10. 19% - 20% increasing when compared to death rate

11. Begins in areas where no soil is initially present

12. Are climatically and geographically defined as similar climatic conditions on the earth - such as communities of plants - animals - and soil organisms and are often referred to as ecosystems.

13. A federal agency charged with protecting human health and the environment by writing and enforcing regulations based on laws passed by congress

14. Refers to the combined physical and biological components of an environment.

15. Consists of temporarily holding the sewage in a quiescent basin where heavy solids can settle to the bottom while oil - grease and lighter solids float to the surface. The settled and floating materials are removed and the remaining liquid may be dis

16. Could be melting of the polar ice caps - destruction of coral reefs - severe winters and summers - excessive rain fall in some areas and not enough in others - drought - etc.

17. Occurs when human activity introduces increased amounts of plant nutrients - which speed up plant growth and eventually choke the lake of all its animal life.

18. The scientific study of the distributions - abundance - share affects - and relations of organisms and their interactions with each other in a common environment.

19. The ocean water pollutant that is the most damaging

20. Living or active in the absence of free oxygen

21. Also known as the boreal forest - is a biome characterized by coniferous forests. Long and cold winters are the dominant feature of the ----- biome. The temperature in a ----- biome can range from -76 to 104 degrees.

22. A method of farming used when a slope is too steep or too long - or when the other types of farming may not prevent soil erosion. ------ farming alternates strips of closely sown crops such as hay - wheat - or other small grains with strips of row cr

23. Which region of the U.S. is most affected by acid rain?

24. The effect industrialization initially has on birth and death rates

25. Water pollution affecting a water body from different sources - such as polluted runoff from agricultural areas draining into a ricer - or wind-borne debris blowing out to sea. NPS may derive from many different sources with no specific solution to r

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