So what will it be...

global warming or an energy shortage?

futurepundit points to analysis that makes a good point: If fossil fuels are running out (which may be true of coal as well as oil), then global warming scenarios that assume drastic rises in fossil fuel emissions over the next hundred years are likely to be overstated. Even so, you often see someone complaining both about global warming and about peak oil in the same breath (e.g., Bill Clinton).