In the old days, renewable energy was the best option available. Then it became a social statement. Now with fits and starts, it's creeping toward the mainstream.
To give CNET readers some perspective on renewable energy, we've assembled a slideshow on renewable energy through the ages, its present form, and some ideas as to where it's going.
The history of using the wind, sun, and water reaches back to antiquity. But what's remarkable about many renewable-energy technologies being pursued today--solar, wind, geothermal, and bioenergy--is that today's product ideas often have roots in research begun after … Read more