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They've gone up. They didn't have much choice, since before the Big Bang there was none at all.

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Q: How have the levels of carbon dioxide and oxygen changed since the big bang?
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Related questions

Which organs are oxygen and carbon dioxide changed?

Oxygen and carbon dioxide change in the lungs.


Are high levels of carbon dioxide bad?

well, you don't breath carbon dioxide, you breath oxygen


Starting billions of years ago algae lowered the levels in the atmosphere?

Carbon Dioxide


Levels of oxygen and carbon dioxide in the blood are tested by?

Oximetry.


How does cellular respiration effect carbon and oxygen in the atmosphere?

Cellular respiration uses oxygen and generates carbon dioxide. Photosynthesis uses carbon dioxide and generates oxygen.


What happens if levels of carbon dioxide or oxygen in your body change?

if the oxygen levels are too low, your muscles won't get the oxygen they need from the blood cells. if the carbon dioxide levels are too high, well, carbon dioxide is a waste product, the same thing will happen. this is why when you hold your breathe you pass out. if the muscles don't get the oxygen they need they can't move.


How does your body monitor the oxygen and carbon dioxide levels in your blood?

jvhjlku


What happens to the oxygen levels in the blood as it moves through the lungs?

the oxygen releases carbon dioxide


How has the atmosphere changed?

Carbon dioxide is increasing in the atmosphere, and oxygen is decreasing.


How would a drastic reduction in plant life on earth affect the atmosphere?

levels of oxygen and carbon dioxide would decrease and levels of carbon dioxide would increase.


What happens to the blood concentration level of carbon dioxide following increased breathing?

With increased breathing, levels of carbon dioxide in the blood drop and levels of oxygen rise.


What are ways the body changes the way you breathe in effort to keep your levels of oxygen and carbon dioxide balanced?

What are ways the body changes the way we breathe in effort to keep our levels of oxygen and carbon dioxide balanced