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

Explanation:

carbon dioxide is a colorless odorless gas formed when substances contain carbon such as Federal gas coal and wood are burned with insufficient supply of air

it can be harm full to humans I think and it is not in the chemical compound for air

Explanation:

the EPA stressed that it considers CO2 and other so-called greenhouse gases to be pollutants because of their role in propagating climate change, not because of any direct health effects. But despite continued pressure from environmental groups, the administration never moved to regulate the gases.

the offspring would all be white. if the parents are both white flowers then they have the genotype rr, which when crossed results in an all white punnet square.