Question
Which percent of Earth’s atmosphere does carbon dioxide gas make up?(1 point)
Responses
less than 1 percent
less than 1 percent
about 78 percent
about 78 percent
more than 99 percent
more than 99 percent
about 21 percent
Responses
less than 1 percent
less than 1 percent
about 78 percent
about 78 percent
more than 99 percent
more than 99 percent
about 21 percent
Answers
GPT-5 mini
less than 1 percent
(CO2 is about 0.04% of the atmosphere—roughly 400 ppm.)
(CO2 is about 0.04% of the atmosphere—roughly 400 ppm.)