The pessimistic view of global warming from Robert Samuelson - even now the problem has been recognised, it's still too expensive to do anything meaningful about it.
But there was a more optimistic view from Barclays Capital's Tim Bond yesterday, when I dropped in on the launch of the bank's annual Equity-Gilt Study. He pointed out the International Energy Agency's estimate that the next thirty years will need to see a 50% increase in energy generation capacity, at a cost of $20 trillion (in 2000 dollars). As well, the world will need to reduce its reliance on fossil fuels, which currently supply 80% of energy. (These two tasks overlap to a certain extent; half that $20 trillion represents replacing worn-out infrastructure, which in a lot of cases could mean substituting clean nuclear or renewable sources).
There are no new sources of oil to be found. Continued dependence on fossil fuels will mean continually higher prices - a conclusion borne out by the shapes of the forward curves for the fuels, which are deeply in contango and have been for some time. Clearly no one expects the oil market to slacken soon. Clean energy is backwardated, which Bond interprets as showing that no one expects demand to pick up much - it could also represent an anticipated increase in supply, but that's less likely.
At the moment, there still isn't a clear enough policy environment on clean energy; the EU's emissions trading scheme comes to an end in 2012, far too soon in planning terms, and the US has yet to decide on anything. (At this point Bond, in a rather bemused way, pointed out that things have improved now that the party that actually believes global warming is happening is in control of Congress. 80% of conservative Republicans don't believe in human-caused climate change, a group which until recently included the chairman of the Senate environment committee!)
Bond got really optimistic, however, talking about the benefits. He compared the coming decade to the 1970s, when the energy crunch meant that almost the only sector to make good returns the energy sector. The same will be true again - but that doesn't mean we'll see the same economic stagnation, he says. "Every major technological change was accompanied or followed by faster economic growth", and the railway and IT booms will be emulated by the coming clean energy boom, he predicts.
I confess I'm slightly less optimistic; after all, cleaning up energy production will have an element of the broken-windows approach to it, with regulation rather than market forces compelling spending. Though as energy prices rise - and returns focus on energy - market forces will come into line.
Mark Thoma has more links, including the Chinese government very helpfully sticking in its oar in its usual emollient and diplomatic style.