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The fundamental problem comes down to one issue.. How are we going to cap the emission of CO2 ( which will have to be done by reducing our dependency of fossil fuel.. )

as the difficulty in ratifying the tokyo treaty showed.. this will be no easy task for the international community to tackle..

With the BRICS countries rapid industrialization followed by other developing countries around the world, curbing the co2 emission will be very difficult.... ( i mean let alone convincing these nations.. we are having enough trouble convincing ourselves in reducing our dependency on fossil fuel)

However, i do not think the situation is hopeless. With events such as al gore winning the nobel prize, global warming seems to have gained a much larger eminence than they have every before...

i mean... barely 10-15 years ago, global warming was still contested at various levels and was even criticized as a over reaction by tofu eating liberals...

Considering how recycling started off as a weird thing that greenies do as a socially accepted custom, I think the same can be done with global warming. I believe with the recent rise in the awareness of this issue, far more people are now willing to make sacrifices, for their own sake if not for any other reason.