"Green Jobs" will be real, but invisible

John Whitehead quotes Joe Romm:

Last week economist William Nordhaus slammed global warming deniersand explained that the cost of delaying action is $4 Trillion. As I wrote, Nordhaus’s blunt piece — “Why the Global Warming Skeptics Are Wrong” – is worth reading because, like most mainstream climate economists, he is no climate hawk. 

Those costs are real.  Those costs shift the supply curve for stuff in.  Those costs reduce employment.  So "Green Jobs" are largely not those building windmills and solar panels (the total number of these jobs will be small relative to the economy).  "Green Jobs" will be the jobs saved from cost reductions associated with reduced greenhouse gases.  This is why good environmental policy is also good economic policy.

(h/t Mark Thoma)