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0.039% is the amount in the earth's atmosphere.
A:What is "normal" though is certainly an interesting question. Last March the atmosphere is said to have contained 0.0391% CO2. Currently we are at that same amount. Historically, the world's most prominent science experts of the period, claimed roughly that same level was what we considered normal. Some of these science experts received noble prizes for their work.Modern science experts though view things slightly differently. Many are claiming that the 90,000 measurements made over the past 150 years were all high and that the real number was about 300 ppm or lower. Both sides of this argument agree that the number is somewhere in between.
In any event our atmosphere has seen levels that vary due to fluctuations in temperature. The normal number will follow the current climate trends. In periods where temperature fall, CO2 will follow and fall. The normal will be lower during these periods. In periods where the temperature will rise, like the past several hundreds of years, we will see CO2 levels naturally rise.
Wiki User
∙ 12y ago
Wiki User
∙ 9y agoCarbon dioxide levels are measured in molecules of CO2 per 1 million molecules of the air.
At the beginning of the Industrial Revolution (1700), levels were about 280 ppm (parts per million) or 0.028%.
In 2013, levels reached 400 ppm (parts per million) or 0.04%.
Wiki User
∙ 10y agoThe percentage of CO2 in the atmosphere is (2013) 400 ppm (parts per million) or 0.04%.
The overall composition of the atmosphere is as follows:
Nitrogen - 78.03%
Oxygen - 20.99%
CO2 - 0.04%
Noble gases - 0.95%
Water vapour, dust particles, other impurities - Variable
Wiki User
∙ 9y agoLevels of carbon dioxide have been roughly level at 280 ppm for the past several hundred years.
The levels today are 400 ppm.
Wiki User
∙ 10y agoNot much; less than 1%. But it's enough to cause a certain amount of "greenhouse effect," and it's also enough to allow plants to conduct photosynthesis.
Wiki User
∙ 13y agoIt is 78% nitrogen 21% oxygen and 1% of other gases such as argon carbon dioxide and water vapor
Wiki User
∙ 11y agoi don't no so dont ask me
Anonymous
0.039%
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Why is there a higher percentage of CO2 in the air exhaled than inhaled?
The air we inhale comes from the athmosphere; the percentage of CO2 in the athmosphere is next to insignificant. The air we exhale comes from the cellular environment; cells give off CO2 as part of their metabolism, thus CO2 venous blood concentration is high
The concentration of carbon dioxide CO2 in air is 380 ppm What is this in a percentage using significant figures?
.000380 is 380 millionths, ppm is to millionths what % is to hundredths. If you now move the decimal two places to the right to conver to a percentage, then 380 ppm is approximately .04%, and thus, CO2 makes up .04% of the air (which is what I assume this question is refering to)
How is co2 in the air useful to plants?
The plants use CO2 from air for photosynthesis. The air entering into its leaves through stomata comes in contact with photosynthetic cells and diffuse CO2 for assimilation to form carbohydrates.
What gas shows the greatest difference in percentage between inhaled and exhaled air?
Oxygen is the gas that demonstrates the largest difference in percent between air that is inhaled, and air that is exhaled. The symbol for oxygen is O.
What is the density of co2 gas compared to the air in the room?
CO2 gas is more dense than the mixture of air we breathe. You can see this when dry ice sublimates.
What percentage of exhaled breath is CO2?
The air we breath in is roughly 21% O2 and 0.04% CO2 and we breath out air that is 16% O2 and 4% CO2
Why is there a higher percentage of CO2 in the air exhaled than inhaled?
The air we inhale comes from the athmosphere; the percentage of CO2 in the athmosphere is next to insignificant. The air we exhale comes from the cellular environment; cells give off CO2 as part of their metabolism, thus CO2 venous blood concentration is high
How plants help to maintain the percentage of gases in air?
They reduce CO2 and increase O2.
How do plants help in maintaining the percentage of gases in air?
They reduce CO2 and increase O2.
Percentage of nitrogen in the expired air?
The percentage of expired air is around 74-80% Nitrogen. Because of gas exchange in the lung, expired air is also rich in CO2 and lower in O2 than atmospheric air (which has a 21.8% O2 comp and a .03 - .04% CO2 comp). Thus, the O2 and CO2 values narrow in difference to 14.5-16% and 4-5.5%, respectively.
Why CO2 is more in alveolar air than expired air?
Alveolar air mixes with air in the anatomic dead space on its way, which is rich in oxygen. hence % of oxygen is more in expired air. Thus though amount of CO2 does not decrease, percentage decreases as inspired air contains very less amount of CO2 (0.03%).
Is CO2 an atmospheric pollutant?
yes, when it is released in large amounts than the normal natural percentage in air
How can you get CO2 out of the air?
it can get out of the air by cricleating are round and around untill you can see the co2 in the air thats when you no that the co2 is out because you can see the air
Why percentage of oxygen and nitrogen in air?
70% Nitrogen 17% Oxygen 3% other gases. (includes methane and CO2)
Does propane weigh less than air?
Actually it is heavier than air. And it will sink much like co2 does in air
What two ways people can contribute to too much CO2 in the air?
penius
How do plants help to maintain the percentage of gases in air?
They reduce CO2 and increase O2.
