What percent of earth's atmospheric gases by volume is CO2?

The atmosphere of Earth is the layer of gases, commonly known as air, that surrounds the planet Earth and is retained by Earth's gravity. By volume, dry air contains 78.09% nitrogen, 20.95% oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases.

More Info: en.wikipedia.org

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32 Comments

David Kloete

We can tell that you're a scientist, since you work at a real estate company!

Maria Feltner

Some of our children are reading this and, I can't believe, I have to stop my grandson from playing with me here. You all grow up and stop calling each other name. I thought this is just a game! This is good way for him and I to learn. God bless everyone!!!

Maho girl

babafrby, if you have such disdain for this site why are you still visiting it?

Jacqui Wilson

What a disgraceful display of name calling by 2 people who profess to be educated. If you're going to debate you'd garner much more respect by doing it civilly!

Sara Freeman

Should have paid more attention in science

David Stokes

And that is why we need more in the atmosphere because plants and trees, the source of our food need at least 3% CO2 to survive. We are clove to extinction if we cut atmospheric carbon any further.

David Stokes

Ben Totuous, 0.039% is very close to none at al, and any less will see the death of trees and grasses where our food comes from.

Elsy O. Stromberg

Humberto Carrasco, BETTER THAN MOST OF US

Bob Gorby

Venus: 98?%

Karin Johansson

Becca, no it isn't. Because the photosyntesis is not working like you think.

Plums

My daughter helped me with this question as she is a climatological.. sorry about that!!

Wyla Reedy

Darlene Davidson, Don't feel special

Pierre Poirier

Kerem Oner, go north of your country. Not just a bit. Near the poles where glaciers are melting at an accelerated pace. Where the pergelisol, that traps huge quantities of methane, wich is far more dangerous than C02 as a greenhouse gas. Ask the Inuits about the shortened winters. They can tell you about the day last February when they got a day at 0 degrees celsius, 30, yes thirty degrees warmer than average. Then ask us in Eastern Canada about our wi ters now, hen instead of getting snow srorms and an occasional ice or rain storms, our last three winters, we get few all snow storms. And then, seek climatology maps that show month after month, year after year, that the temperatures are consistenly warmer than the a erage. There is a solutely no doubt that the pkanet is heating up. And it is certain that we humans are the main culprit.