Carbon exists in the atmosphere in the form of

Carbon exists in the atmosphere in the form of(a) carbon monoxide only(b) carbon monoxide in traces and carbon dioxide(c) carbon dioxide only(d) coal

Identify which contains more carbon – the oceans or the atmosphere?

Carbon and It's Compounds

Which of the following processes that return carbon to the atmosphere is not a natural activity?CombustionRespirationDecompositionDecay

So the amount of carbon 14 in the atmosphere hasn't or can't be changed?