Which gas do mammals exhale?

Answer 1

Mostly CO2 gas (carbon dioxide), but some quantity of all of the gases that were inhaled to begin with are exhaled whether they are normal constituents of the air we breathe or contaminants of it. Also notably, the lungs of most animals are not 100% efficient at removing and using the O2 gas (oxygen) that they are designed to capture for the body's use, so some quantities of it are exhaled (less than what was originally inhaled, obviously).

Answer 2

Carbon Dioxide. We inhale oxygen and exhale carbon dioxide. Plants do the opposite, that's why they are important to the earth.

Answer 3

They breath out CO2 which is carbon dioxide because there body need oxygen and they breath CO2 because they are carbon based life forms.

Answer 4

Carbon dioxide.

Answer 5

co2

Answer 6

Mostly CO2.