In addition to oxygen, which gases make up the largest percentage of Earth's atmosphere?
hydrogen, helium, and water vapor hydrogen, methane, and ozone carbon dioxide, water vapor, and nitrogen carbon dioxide, methane, and helium
Question: In addition to oxygen, which gases make up the largest percentage of Earth's atmosphere?
A. hydrogen, helium, and water vapor
B. hydrogen, methane, and ozone
C. carbon dioxide, water vapor, and nitrogen
D. carbon dioxide, methane, and helium
Answer: