CBSE BoardEnglish MediumSTD 10ScienceMODEL PAPER 22 Marks
Question
Why is it not advisable to sleep under a tree at night while resting under it during mid$-$day is not bad?
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Answer
During the day$,$ in presence of sunlight$,$ the plants use up the $CO_2$ and release $O_2$ in the process of photosynthesis. But during night$,$ plants won't perform photosynthesis so they are unable to use the $CO_2$ and this further leads to increase in the proportion of $CO_2$ in the air. During night the trees breathe in oxygen and release $CO_2$. If one sleeps under the trees$,$ the amount of increased $CO_2$ in the air around will certainly affect the health. So it is inadvisable to sleep under trees during night. He suffers from suffocation. He feels excess weight on his chest. For this reason$,$ some rural people imagine and fear that ghosts would come and sit on their chests if they sleep under Peepal or Banyan trees.
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