Nitrous oxide, commonly called laughing gas, has been a matter of conc – McqOptions

MCQOPTIONS

1.	Nitrous oxide, commonly called laughing gas, has been a matter of concern to environmentalists recently because:?
A.	it is thought to cause cancer at low concentrations.
B.	it is a greenhouse gas.
C.	it produces photochemical smog.
D.	none of the above
Answer» C. it produces photochemical smog.

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