Which percent of Earth’s atmosphere does carbon dioxide gas make up?(1 point)
Responses
about 78 percent
about 78 percent
about 21 percent
about 21 percent
more than 99 percent
more than 99 percent
less than 1 percent
Responses
about 78 percent
about 78 percent
about 21 percent
about 21 percent
more than 99 percent
more than 99 percent
less than 1 percent