'(<a href="http://www.j-archive.com/media/2011-06-29_J_08.wmv">Sarah of the Clue Crew points at a diagram of the earth's atmosphere.</a>) Water vapor and ozone are two of these gases, collectively known as GHGs, which keep heat from escaping the atmosphere'
greenhouse gases
GOING GREEN: Water vapor and ozone are two of these gases, collectively known as GHGs, which keep heat from escaping the atmosphere
Water vapor and ozone are two of these gases, collectively known as GHGs, which keep heat from escaping the atmosphere
Water vapor and ozone are two of these gases, collectively known as GHGs, which keep heat from escaping the atmosphere
GOING GREEN
greenhouse gases
GOING GREEN