not only the plants but their waste are also useful to us. what evidence do you give for it.
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plants take carbon dioxide for photosynthesis and they give out oxygen as it is not wanted by them and is a waste.
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1.plants use carbon dioxide for the process of photosynthesis and give out oxygen as waste which we need for our survival.
2.when plants die and get mixed with soil they form humus which we use as manure.
2.when plants die and get mixed with soil they form humus which we use as manure.
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