CBSE Class 6 Answered
How is oxygen refilled in the atmosphere?
Asked by Topperlearning User | 06 Feb, 2018, 13:52: PM
The oxygen of air consumed by human beings and animals in respiration and in burning of fuels is constantly replaced by plants through the process of photosynthesis.
Answered by | 06 Feb, 2018, 15:52: PM
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