Well, that depends on context, place and time - doesn't it ?
I'm not sure what you're trying to achieve with your poor and cheap shot.
The irony is that this has *nothing* to do with what Carl might have said - or lack thereof. That's your first mistake.
It has been a well established scientific fact (for quite some time now) that our planet's "greenhouse effect" has allowed the acquisition of an atmosphere.
I'm not sure why I'm entertaining your silly post, considering that your supercilous persona reveals the reason why you're so misinformed.
One could indeed argue that setting the record straight about this matter might better belong else where, as I'm sure we would readily agree that no one's in a hurry to affect Carl's legacy - far from it.
But my post about greenie houses still is pertinent and not out of place when it is put in its scientific context... so... I guess I conversely am entitled to assert that "you didn't really learn much from ... ??? huh ???"-> I'm lost here !
It would help if you attempt to rectify someone, to actually qualify *what* I am supposed to "not to have learnt" by your claim.
I thought that the greenhouse gases do help to protect Earth from UV rays, but when the effect becomes too strong it traps gases in leading to increases in temperature, etc. Forgive me if I'm wrong (I've never watched Cosmos, this is just what I remember from high school.).