Several things here. Either (a) you don't understand what plants actually do, (b) you don't understand the definition of the word "exuding", or (c) you understand neither. Your post makes you sound like an idiot, so let me help you out.
First, the definition of "exuding".......................
exude
ex·ude | \ ig-ˈzüd \
exuded; exuding
Definition of exude
intransitive verb
1: to ooze out
2: to undergo diffusion
transitive verb
1: to cause to ooze or spread out in all directions
2: to display conspicuously or abundantly - exudes charm
Now, for how plants operate.......................
New research suggests plants could be releasing more carbon dioxide into the atmosphere than previously thought.
www.abc.net.au
During daylight hours, plants take in carbon dioxide and release oxygen through photosynthesis, and at night only about half that carbon is then released through respiration.
However, plants still remain a net carbon sink, meaning they absorb more than they emit.
"Currently, around 25 per cent of carbon emissions from the use of fossil fuels is being taken up and stored by plants, which is good, as it helps reduce the concentration of greenhouse gases in the atmosphere," ANU researcher Owen Atkin said.
"Our work suggests that this positive contribution of plants may decline in the future as they begin to respire more as the world warms."
While plants may exude more CO2 at night, they still exude more oxygen and therefore are a "carbon sink", meaning they take in more CO2 than they emit. Knowing that plants take in CO2 and emit oxygen is something that is taught in elementary science class.