There is one policy that seems to bridge the gap between the type of non-intrusive nudges Sunstein champions and the type of policies he knows are ultimately necessary to do something about global warming. They're called bag taxes.

Inspired to take action by the successes of large cities and many towns in NY in passing ordinances to ban or impose fees on single use plastic bags, K-12 schools are launching a campaign to pressure the City Council to consider the issue more seriously.

Over four decades of plastics addiction has caused a true unnatural disaster in our oceans -- think of the Gulf oil spill only a couple thousand miles longer.

The nefarious alter ego of Andy Keller, founder of reusable bag company ChicoBag, Bag Monster is a character born of 500 plastic bags stitched togethe...