Multiple choice

It is harmful to sleep under a tree at night because the tree releases

  1. Oxygen

  2. Carbon dioxide

  3. Carbon mono-oxide

  4. Sulphur dioxide

Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

During the night, plants undergo respiration rather than photosynthesis, consuming oxygen and releasing carbon dioxide. Sleeping under a tree at night can lead to a lower oxygen and higher carbon dioxide concentration.