Question of the Day

What portion of the earth's atmosphere is comprised of carbon dioxide?

Correct Answer

Tell Me More

Carbon dioxide constitutes 0.04% of the earth's atmosphere. At the outset of the industrial revolution in the late 1700s, this figure was about 0.03%. Carbon dioxide is a generally "colorless, odorless, non-toxic, non-combustible gas." It is also (1) the most significant manmade greenhouse gas and "contributes more" to the greenhouse effect than "any other gas" released by human activity, (2) "required for the photosynthesis of all plants," and (3) "vital to life" because "almost all biochemicals found within living creatures derive directly or indirectly from" it.

DocumentationGreenhouse Gas Facts




Reload Question
Share via Facebook
Share via Twitter
Share via Email
Embed into your website
About the Fact App
Articles by Topic