Quiz principal gases

If the atmosphere were made up of these molecules alone, it would be totally transparent, as if it simply weren't there. The Earth's surface would then have the same average temperature as the Moon, -18°C!

What's special about greenhouse gases?

In the Greenhouse gases section: choose a Methane molecule and insert it in the leftmost circular box. Next to it, place a carbon dioxide molecule, then a water molecule and a nitrous oxide molecule. Further questions below.