Global Warming: Long term observations yield unsurprising results

[Ravenshire]

Thanks to both of you. I do believe in global warming, it's obvious. With CO2 rising into the atmosphere and the energy trap above the earth keeps it's heat from the surface, I understand the trapping effect, but with all the surface area of the atmosphere against a very cold space it seems the heat would travel into space. Energy is not bound to the earth like other things and can travel into space, heat being one form of energy why wouldn't it travel into space, heat does move to cold not visa versa.

GC

(emphasis iis mine)

While space is quite cold (~4 deg. K), vacuum is also a very efficient insulator. It's really hard to transfer heat without a medium.