Question

Name one gas whose percentage is higher in air from a crowded classroom.

Answer 1

Answer:

EPA guidelines suggest that carbon dioxide concentrations in classrooms be no higher than 700 ppm more than outdoors, which typically ends up being around 1,000 to 1,100 ppm.

Answer 2

Answer:

carbon dioxide concentrations in classrooms be no higher than 700 ppm more than outdoors, which typically ends up being around 1,000 to 1,100 ppm.