Which one of the following is a source of methane emission into the atmosphere?
A. Automobile exhaust fume
B. Industrial chimney
C. Mining
D. Wet land
Answer: Option D
A. Automobile exhaust fume
B. Industrial chimney
C. Mining
D. Wet land
Answer: Option D
Traditional 'battery' contains which of the following chemicals?
A. Ethylene glycol
B. Sulphuric acid
C. Sodium bicarbonate
D. Ethanol
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