Carbon dioxide is exhaled (whereas 20% oxygen is inhaled, since the vast majority of the remainder of inhaled air is composed of nitrogen, 79%).
carbon dioxide
Carbon Dioxide is important to exhale.
Carbon-Dioxide
Oxygen/o2
carbon dioxide
stinky gas called fart. Carbon Dioxide (When you exhale)
carbon dioxide
You inhale oxygen, and you exhale carbon dioxide.
carbon doxide
This gas is nitrogen.
Carbon Dioxide is important to exhale.
Carbon dioxide
Carbon Dioxide
Carbon Dioxide.
Carbon-Dioxide
Carbon Dioxide
Carbon dioxide is wat u exhale; oxygen is wat u inhale
CO2. Carbon dioxide.