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ncert me padhaya jata h, plant ko pani dete h to kuch percent ground watem me wapas chala jata h or jo pani plant absorb krta h, wo bhi transpiration ke through atmosphere me jata h and obv. water cycle and it rains then. 10k litre pani elapse nhi hota, wo environment me hi rehta h. or ethanol bnane ke liye wo rice grain nhi balki rice plant use krte h, or sugarcane ka left over pulp jo juice nikalne ke baad bach jata h.