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

Carbon dioxide is considered a pollutant because simply, it can cause global warming. On the other hand, CO2 increases the acidity of some bodies of water because CO2 will convert to carbonic acid it reacts with water.

explanation:

venn diagram is pictorial representation with of circles showing the relation between two finite sets or things. the intersection part of two circles conveys the relation present in between those sets or things.

here in the venn diagram of sand and salt two circles represent sand and salt. but the area falling under the intersection of these circle represents the mixture of sand and salt.

so, in a venn diagram the mixture will be placed in a middle that is in between the intersection of two circles.