71. The major reservoir of carbon is
72. Causative organisms of Malaria
73. The undesirable change in physical, chemical or biological characteristics of air, land and water is referred as
74. Example for a bio-degradable polymer is
75. The European Union has a permanent ban on the use of __________ in toys.
76. A biodegradable plastic developed by Biopak Corporation Australia
77. A __________ is formed due to the collection of water in a natural basis or depression in a mountainous area or in plains.
78. The simplest aquatic ecosystem can be seen in a
79. The most endangered ecosystem in India
80. The expansion on PQLI is
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