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Natural gas _____.

has octane as its primary component

produces less green house gases per energy unit than oil or coal

was discovered by bunsen in 1885

will be depleted by 2030

is transported primarily by truck and rail

Verified Answer :

the answer of the question can be answered by eliminating the wrong answer. the primary component of natural gas is methane, it was first discovered by chinese is 500 BCE and natural gas is transported using pipelines. so the possible answer would be it produces less green house gases per energy unit than oil or coal