Green Eyeshades vs. Starry Eyes: The Cap or Tax Debate

From this post:

How do you get broad support for, let alone implement, climate-change policy when the groups most directly affected have no idea how much the scheme might cost them or their customers?

Strict caps on carbon emissions may make intellectual sense. But the reality on Capitol Hill is that cap-and-trade proposals are getting watered down, leading even some environmentalists who support the approach in theory to criticize how the bills are shaping up in practice. It’s yet another lesson that public policy is the art of the possible.