Question

how birds sleep in tress which produce carbon dioxide​

Answer 1

Answer:

CO2 is not particularly toxic - you are producing it constantly in your own body, and expelling it only partially from your lungs with every breath. The background level of CO2 is about 400 parts per million, or 0.04%. Humans can tolerate concentrations of CO2 up to 2% (20,000 parts per million) for periods of several hours, and birds would have similar tolerances. So the slight rise in CO2 levels that occurs at night time due to the pause in photosynthesis causes no problems at all.

Answer 2

Answer: CO2 is not particularly toxic - you are producing it constantly in your own body, and expelling it only partially from your lungs with every breath. The background level of CO2 is about 400 parts per million, or 0.04%. Humans can tolerate concentrations of CO2 up to 2% (20,000 parts per million) for periods of several hours, and birds would have similar tolerances. So the slight rise in CO2 levels that occurs at night time due to the pause in photosynthesis causes no problems at all.

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