71. The controversial dam across the river Narmada?
72. Snow leopard is found in which National Park?
73. The place where the worst nuclear disaster took place?
74. The phenomenon of accumulation of non-biodegradable pesticides in human beings
75. The main energy source for the environment is ________
76. Soil chemistry is considered an __________ factor
77. Trichodermaharzianum has proved a useful microorganism for
78. The occurrence of pesticides like DDT in higher trophic levels is termed as
79. The study of food chains and food webs is observed in the phenomenon known as
80. BOD stands for
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