(c) LPG
(d) CNG
19. Nercosis in plant leaf is caused due to
(a) SO2
(b) CO2
20. The most important indoor air pollutant is
(a) SO2
(b) CO2
(c) N20
(d) CO
(c) N20
(d) Radon gas
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NERCOSIS IN PLANT LEAF IS CAUSED DUE TO CO2
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Necrosis in plant leaf causes due to CO2
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