Also, the production and use of ethanol fuel contribute to the increase in atmospheric carbon dioxide and to global warming, because twice as much fossil fuel energy is burned in ethanol production than is produced as ethanol.
(the production and use of ethanol fuel; contribute; to the increase in atmospheric carbon dioxide and to global warming; because twice as much fossil fuel energy is burned in ethanol production than is produced as ethanol) (twice as much fossil fuel energy; is burned; L:in ethanol production)
the production and use of ethanol fuel twice as much fossil fuel energy
contribute is burned
to the increase in atmospheric carbon dioxide and to global warming because twice as much fossil fuel energy is burned in ethanol production than is produced as ethanol
L:in ethanol production