Which tale is more likely true… or are they both rancid?

Question

The existence of Nemesis, a companion star with a 26 million year orbit, or the Global Warming that is caused by the emission of CO2 by man ?

Answer 1

What the h**l does that have to do with anything?

Answer 2

Co2 is more like it.

Answer 3

Neither.  The primary driver of the climate is the sun.

Answer 4

Both Νέμεσις and AGW seem possible, but noting to be concerned about to me.