Who Should Pay For Climate Change?

Should airline passengers pay a small tax to help out? How about global money dealers? Or perhaps governments should take what they spend subsidizing gasoline prices and put it toward the climate cause.

Delegates to the U.N. climate conference hope to agree in its final days on setting up a new "green fund" to help poorer countries grapple with global warming. Then the real arguments will begin – over where the cash will come from.

U.N. Secretary-General Ban Ki-moon stepped into the middle of the debate earlier this year by enlisting a high-level group of international political and financial leaders to offer advice.