If the industrialized world can make greener tech and practices cost-effective (with or without a carbon tax), that efficiency and economy of scale will radiate

If the industrialized world can make greener tech and practices cost-effective (with or without a carbon tax), that efficiency and economy of scale will radiate out to the rest of the world in a positive feedback loop. The problem isn't that scalable solutions don't exist; it's that oil and gas are still (artificially) cheap by comparison. It's one thing to ask the Western middle class to take a hit to their lifestyles, but the working poor across the world don't have that option.