In Week 4 we looked at how CO 2 concentrations have changed over time. Which of the following is true?

Question

In Week 4 we looked at how CO 2  concentrations have changed over time. Which of the following is true?

Accepted Answer

Atmospheric CO 2  is now higher than at any point in the last 800,000 years

Answer

The concentration of methane in the atmosphere has been about the same as carbon dioxide since about 1950

Answer

The amount of CO 2  absorbed by the oceans is decreasing

Answer

CO 2  both increases and decreases every year, so there is no long term change in CO 2

Answer

CO 2  has steadily increased over the entire period that we are able to assess CO 2  levels

Crowdly