It seems we are not as serious about saving the planet as we like to claim. That's not really a surprise....
The US Government has slapped a 31% tax on solar panels, just when they were getting cheap enough that you could actually justify them.
It's said that the US imported abut $3bn worth of solar panels in 2011. At wholesale prices running around a dollar a watt, and most panels rated 200W or better, that's something in the range of 15 million panels. Installed in sunny locations, it's (very) roughly the equivalent of a 10 MW fossil fuel plant.
Oh well. Natural gas is clean and cheap. Keep on frackin'!