73. Where would you find the HIGHEST concentration of coral reefs?  

49. Which material should NOT be added to a compost pile?  

58. What uses the GREATEST percentage of water in a U.S. household?  

27. An essential ecological process that makes life on Earth possible is called:  

59. What alerted researchers to a problem in the waters of the Gulf of Mexico?

Part 2, 25 points, pick only 1 for comprehensive answering and discussion in the text box. 1. Explain the point source pollution and non-point source pollution.  Give examples of both. 2. Explain hypoxia; what causes hypoxia and give examples of areas where hypoxia occurs; finally how can hypoxia areas be treated to reduce hypoxia.  3. There are five factors that affect human population growth; give four and define each four.  4. There are nine categories in developing a green city; name 4 and define the metrics accessed in the four you choose. 5. There are 6 steps to reduce environmental health hazards; define four and give an example for each of the four.   

35. What is the chemical formula for ozone?  

38. Why should we care about ozone?  

63. The end result of eutrophication is:  

37. Ozone-depleting chemicals are most efficient at the poles, both for Arctic and Antarctic regions. The major reason for this is: