The main culprit of greenhouse effect is Carbon dioxide But which is the second element contributing most to greenhouse effect
(A) Nitrogen Dioxide (NO2)
(B) Chlorofluorocarbons (CFCs)
(C) Methane (CH4)
(D) High-fructose corn syrup (HFCs)
As a result of which treaty, ozone hole in Antarctica is slowly healing
(A) Koyoto protocol
(B) Ottawa treaty
(C) Montreal protocol
(D) Oslo Accord
Montreal Protocol 1987 was__________
(A) Treaty among nations to reduce nuclear arsenals
(B) Climate control treaty
(C) Treaty to protect ozone layer
(D) Trade policy about tarrifs
Disolved oxygen (DO) in water should be
(A) 400 to 800 ppm
(B) 4000 to 8000 ppm
(C) 0.4 to 0.5 ppm
(D) 4 to 5 ppm
Why normal rain is slightly acidic
(A) due to presence of dust in air
(B) carbon dioxide and water in clouds react to form carbonic acid
(C) Ozone depletion
(D) All of these