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(400, 200, 300, 100) parts per million. Today, carbon dioxide levels have exceeded(410, 550, 500, 300) 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 410 parts per million.