Yeah, there are several ever increasingly efficient models of solar power, yet the most efficient to date is still not even close to where it should be. Some bushes, as small as 3 feet in diameter can receive as much energy as a football field filled edge to edge with today's most advanced solar panels. If we were able to harness that science as an energy source organically, then we'd actually have a source that's
good for the environment.
Wind power has increased tremendously lately, yet we are still producing something like a total of 7000 megawatts (we use a little over 2 million megawatts). One of the problems with wind power is the cost; the current amount that we have is worth 4 billion dollars. Even though wind power is considered green energy, it has a negative effect on weather patterns and tends to cool ambient temperatures. It's probably considered green because we don't know much about the results of the effects on weather patterns or to what degree.
The Union of Concerned Scientists seems to favor
wind power over everything else right now. (note: their site is currently showing errors, but if you're interested keep checking it)