31. The pollutants which are already present in nature but are released in substantial amounts by man are known as
32. O3 promotes
33. Carbon monoxide is harmful to human beings as it is
34. Ecological cycle directly driven by sunlight is
35. The establishment of national parks and sanctuaries come under
36. Net productivity is
37. The rate at which the chemical energy is stored by plants is known as
38. Major forests types in India are
39. Deforestation is the major causal agent of
40. The chief products of decomposition of living bodies
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