Repeat after me:
Man-made Global WarmingTM is a MYTH!
Man-made Global WarmingTM is a MYTH!
Man-made Global WarmingTM is a MYTH!
To these folks, that is irrelevant.
They believe in their hearts that we should live diminished lives - "sustainable development" is their mantra, and if Global Warming doesn't alarm us into going there, they'll have another drum to beat five years hence. The end justifies the means...