Question
Which percent of Earth’s atmosphere does carbon dioxide gas make up?
Responses
about 21 percent
less than 1 percent
about 78 percent
more than 99 percent
Responses
about 21 percent
less than 1 percent
about 78 percent
more than 99 percent
Answers
GPT-4o mini
Carbon dioxide (CO2) makes up less than 1 percent of Earth's atmosphere. Therefore, the correct response is **less than 1 percent**.