Question

The video explains that the scientists use oxygen isotope ratios to estimate the atmospheric temperature when the ice froze; what have they found that seems to follow the temperature trend for the last 650,000 years?

Select one:

a. Carbon monoxide levels

b. Carbon dioxide levels

c. Sulfate levels

d. All of the above

e. Increase in dust within ice cores

Answer 1

With increase in temperature from last 650000 years, carbon dioxide also increases and follow the same trend as temperature.

We know that temperature of the earth's surface is increasing so do the carbon dioxide.

Other options are incorrect.

So the correct option is (b). Carbon dioxide.