Why Large Greenhouse Effect On Venus?
q  Venus is very close to the Sun
è  Venus temperature is very high
è  Very difficult for Venus’s atmosphere to get saturated in water vapor
è  Evaporation keep on bringing water vapor into Venus’s atmosphere
è  Greenhouse effect is very large
è  A “run away” greenhouse happened on Venus
è  Water vapor is dissociated into hydrogen and oxygen
è  Hydrogen then escaped to space and oxygen reacted with carbon to
form carbon dioxide
è  No liquid water left on Venus