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Answer»

hile burning it directly it here is cow dung releases a LOT of smoke which pollutes the environment. Also it has very low calorific VALUE. So it is not a good fuel. Whereas biogas which is decomposed cow dung and waste does not RELEASE smoke and has high calorific value. That is why we USE biogas instead of heating it directly. Hope it helps!!! Pls mark it as brainliest!!!!



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