Hey, this is kind of cool. A company called Sterling Planet has created what they're calling "white tags." Just as green tags are based on the creation and use of clean energy, white tags are awarded based on targets for saving energy. In other words, they're energy-efficiency credits.

I hope this takes off. Energy efficiency is a huge source of free, clean energy, and some well-targeted incentives could kickstart a process that would eventually take on a life of its own.