What is carbon dioxide?
.Carbon dioxide is a greenhouse gas.
.Carbon dioxide is a natural present in the atmosphere as part of the Earth's carbon cycle.
.Carbon dioxide is a colorless, odorless greenhouse gas.
What does carbon dioxide do?
.Carbon dioxide is counted for about 82% of all U.S. greenhouse gases.
.Carbon dioxide is produced naturally in the body and during the burning of fossil fuels.
.Carbon dioxide naturally makes up a very small part of the Earth's atmosphere.