Why is it not advisable to sleep under a tree at night?

This question relates to plant physiology, specifically the processes of photosynthesis and respiration. During the day, plants perform photosynthesis, consuming carbon dioxide and releasing oxygen. However, at night, photosynthesis ceases due to the absence of sunlight, and plants continue to respire. Respiration involves taking in oxygen and releasing carbon dioxide, similar to animals. Therefore, sleeping under a tree at night means being in an area where carbon dioxide concentration might be elevated, which can be detrimental to health in poorly ventilated conditions.

• "More oxygen is released" is incorrect; oxygen release stops at night.
• "Less oxygen" is true, but the primary concern is the active release of CO2.
• "Carbon monoxide released" is false; plants do not produce carbon monoxide.