Carbon dioxide is a colorless, odorless gas, why is it considered a pollutant?

Question

Carbon dioxide  is a colorless, odorless gas, why is it considered a pollutant?

anonymous · Answer

i have some answer choices

australopithecus · Answer

It is considered a pollutant because it can act as a heat sink causing global warming. Furthermore, it can increase the acidity of bodies of water as CO2 converts to carbonic acid when reacted with water

australopithecus · Answer

Well those are the two main reasons why CO2 is considered a pollutant

australopithecus · Answer

at least to my knowledge

anonymous · Answer

ok do u wanna see my answer choices cause i really need some help

australopithecus · Answer

so that doesnt answer your question?

anonymous · Answer

yes it does but i am just a Little confused 
would it be like this
It increases the warming of the atmosphere 
or It promotes algal growth in natural waters

anonymous · Answer

wait i think i figured it out

australopithecus · Answer

why would it increase algai growth

anonymous · Answer

It wouldn't I figured it out is this
;It gets it into natural waters and kills the fish

australopithecus · Answer

yup yup carbonic acid and such