10. Where is methane produced? A in the exhaust systems of automobiles OB in the heating systems of homes and other buildings C in the digestive systems of livestock and certain bacteria D in the production

10. Where is methane produced?

A in the exhaust systems of automobiles
OB in the heating systems of homes and other buildings
C in the digestive systems of livestock and certain bacteria
D in the production systems of coal-burning power plants

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10. Where is methane produced? A in the exhaust systems of automobiles OB in the heating systems of homes and other buildings C in the digestive systems of livestock and certain…

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