Most chemicals that are gasses this close to the sun are solids that far out. Carbon dioxide freezes at just -79 C at one atmosphere of pressure. The energy coming in from the sun would not be enough to keep good greenhouse gasses from precipitating out of the atmosphere.
Most chemicals that are gasses this close to the sun are solids that far out. Carbon dioxide freezes at just -79 C at one atmosphere of pressure. The energy coming in from the sun would not be enough to keep good greenhouse gasses from precipitating out of the atmosphere.