[Myrddin]

Green plants release CO2 during the night as part of normal respiration/metabolism of internally stored carbohydrates.

[M Kehoe]

Green plants release CO2 during the night as part of normal respiration/metabolism of internally stored carbohydrates.

In minimal amounts. You know as well as I do, the process of photo synthesis...nevermind, what is the point of your post?

5.56mm

[expatpat]

Green plants release CO2 during the night as part of normal respiration/metabolism of internally stored carbohydrates.

So what? They take in more Co2 during the day than they release at night.