In article ,
Matalog wrote:
I understand that when sunlight is around trees and plants will give off
oxygen and soak up carbon dioxide (photosynthesis) - but at night is it true
that they will give off carbon dioxide? If so, how much of each will be
released during the night and day.

Thanks for any answers.

P.S. At night do they take in oxygen?

They take in oxygen and release CO2 day and night, just as animals do.
However, in adequate light they also photosynthesize, converting CO2
and water to carbohydrates and oxygen. Thus they make their own "food",
carbohydrate, which they burn with oxygen for metabolic energy , just
as animals do.

If they don't get enough light to photosynthesize more than they need to
metabolize, they can't grow and will eventually die. Of course, they use
carbohydrate to build cellulose and other stuff too. But the short answer
is that a growing plant releases more oxygen and absorbs more CO2 than the
reverse.