I wanted to make a further note on how important energy efficiency gains are and how much room there is in this area...
 
According to Steven Chu in a presentation he made on campus earlier this year, when the US imposed refrigeration efficiency standards in 1974, there were a lot of complaints that refrigerators were going to have to be tiny and cost a ton to manufacture..that the policies would price people out of refrigerators. However, that obviously didn't happen. Although the industry didn't really see how it was going to happen at the time (or how much room there was for efficiency gains), the size of the refrigerator didn't get limited...in fact, it grew faster than it did before the changes. And, the price of the refrigerator dropped as well...not just price per cubic foot, but total cost....a trend that continued.
 
But, here's the kicker. The amount of energy we save each year in refrigeration energy efficiency gains (over the efficiency of those units in 1974) is greater than our current renewable energy portfolio. 
 
I find that crazy...that's just refrigeration.
 
Buildings are responsible for about 40% of our energy consumption (this seems high to me...but I'm pretty sure that's what he said). It is believed that with proper design AND environmental control, we could reduce energy consumption of buildings by 80-90%....that's not pocket change in the least.
 
That's why I can see the reason the government wants to make sure it happens. But, why not try tax credits first - and if that fails, implement a more strict program?