Question

What are carbon dioxide levels like in our atmosphere today?

A. at an all-time high in Earth’s recorded history

B. about the same as it was 1 million years ago

C.at an all-time low in Earth’s recorded history

D.lower than it was 75 years ago

Answer 1

Answer:

i believe its A.

Explanation:

Answer 2

The answer is A.

Data has shown that it has made a high record of 412.5 ppm as of 2020.

Hope I helped :)!