Select the correct answer from the list. (1 point)

Question

Between 400,000 years ago until 1950, the levels of carbon dioxide in the atmosphere never exceeded
Today, carbon dioxide levels have exceeded
parts per million.

parts per million.

Answer 1

Between 400,000 years ago until 1950, the levels of carbon dioxide in the atmosphere never exceeded 300 parts per million.
Today, carbon dioxide levels have exceeded 400 parts per million.

Answer 2

For the last one the options are
550
300
410
500

Answer 3

Today, carbon dioxide levels have exceeded 410 parts per million.