It is not advisable to sleep under a tree at night because of the release of:

🧠 Explanation:

It’s not advisable to sleep under a tree at night because trees release carbon dioxide during respiration in the absence of photosynthesis. Unlike daytime, when trees produce oxygen, nighttime CO2 release can reduce local oxygen levels, posing minor health risks. This phenomenon is studied in biology, emphasizing plant respiration and its environmental impact. Understanding this process highlights the importance of ecological awareness in daily life, a key topic in environmental science and health education for safe outdoor practices.