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

A. it gets into natural waters and kills fish

B. it promotes algal growths in natural waters

C. it causes respiratory illness in humans

D. it increases the warming of the atmosphere

Even though carbon dioxide is a colorless, odorless gas, it is still considered a pollutant because D. it increases the warming of the atmosphere.

Global warming is the result of the abundance of carbon dioxide on Earth, which is why ecologists and environmentalists do everything in their power to raise awareness of this problem.