31. The global temperature has risen by about __________ degree celsius, since the peak of last glacialisation.
32. The total number of major languages in India are
33. The combined albedo of the earth and the atmosphere is approximately ____ percent.
34. Oil, coal and natural gas supply approximately __________ % of the energy used in the United States
35. Of all of the energy production in the United States, what percentage is lost in distribution and inefficient use?
36. The average temperature of the earth is about __________ degree F.
37. Hippocrates mentioned air pollution in __________ BC.
38. The first oil well was drilled in the United States in
39. The first Environmental Law in India was enacted in
40. One atom of chlorine can destroy over __________ molecules of ozone.
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