71. Smog is
72. Smoke is produced due to
73. Which of the following air pollutants is not toxic to vegetation i.e., doesn't cause vegetation damage?
74. What are the methods of treatment & disposal of radioactive wastes?
75. Workers working in __________ industry are most prone to white lung cancer.
76. Inhalation of lead compounds present in automobile exhaust (using leaded petrol) causes
77. The average thickness of ozone layer in stratosphere is about __________ dobson unit (DU).
78. For existence of aquatic life in water, the dissolved oxygen content in it, should not be less than __________ ppm.
79. __________ can not control the noise pollution.
80. Green house gases blanket/block the infrared radiation from earth's surface to the atmosphere leading to its progressive warming up. Which of the following gases does not exhibit green house effect?
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