answersLogoWhite

0


Best Answer

The last time atmospheric carbon dioxide levels were as high as they are today (approx. 380 ppm (parts per million)) was around 15 million years ago, during the Middle Miocene period, when carbon dioxide levels are calculated to have been around 400 ppm.

During that time there was no permanent ice in the Arctic and very little over Antarctica or Greenland. On top of that, sea levels were between 75 and 120 ft higher than they are today and world temperatures were higher by between 5 and 10o F.

User Avatar

Wiki User

12y ago
This answer is:
User Avatar

Add your answer:

Earn +20 pts
Q: When were carbon dioxide levels as high as they are today?
Write your answer...
Submit
Still have questions?
magnify glass
imp
Related questions

What are high and low carbon dioxide levels?

Today the average concentration of carbon dioxide in the atmosphere is approx. 4oo vpm; some scientists consider that values over 300 ppm are high.


Why you breathe out carbon dioxide?

We breathe out carbon-dioxide because high levels of carbon-dioxide in the body can be toxic By Akhilesh Sharma


Are high levels of carbon dioxide bad?

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


What is the suffix -capnia refers to?

The suffix -capnia refers to conditions related to carbon dioxide levels in the blood or tissues. It is commonly used in medical terms to indicate conditions such as hypercapnia (high carbon dioxide levels) or hypocapnia (low carbon dioxide levels).


What is the term to use for high carbon dioxide levels and low carbon dioxide levels?

Because you might not be able to breathe in the high or low carbon dioxide because it really depends if you are use to it or not but you maybe be able to take it for other reasons.


What is hypercarbia?

hypercarbia (overly high levels of carbon dioxide in the blood)


The temperature of its atmosphere is increased by high levels of carbon dioxide.?

venus


What benefits do you receive from the Amazon?

High levels of biodiversityNew medicinal possibilitiesLower carbon dioxide levels


How does smoking affect carbon dioxide levels?

Smoking increases carbon monoxide levels in the blood as opposed to carbon dioxide. Carbon monoxide ties up hemoglobin so that smokers have lower blood oxygen levels. Chronic inflammation has been linked to the high levels of carbon dioxide that smokers breathe in as it is 200 times the atmospheric rate.


What planets temperature of its atmosphere contains high levels of carbon dioxide?

It is Venus.


What benefits do we from the Amazon?

Lower carbon dioxide levels High levels of biodiversity New medicinal possibilities


What benefits do we receive from the amazon?

Lower carbon dioxide levels High levels of biodiversity New medicinal possibilities