Environmentally friendly concepts used to be the stuff of a small, enlightend -- and in some cases, on the fringe -- group of people. But very quickly in recent years, the tide has turned. More and more people and companies are going green. Here's a look at some companies and technologies.
When Green Isn't Gold
Bio-diesel companies are re-examining their expansion plans, with some companies delaying projects as profit margins narrow Higher costs for soybean oil - a major source -- is one problem. As Jane Wells reports, even the National Biodiesel Board admits it has "dampened some of profitability in the industry."
The Heat Is On
A recent study by MIT says a concept called heat mining -- or, enhanced geothermal energy -- could provide 10% of the natioon's power. Ormat Technologies uses it to provide power for the city of Reno Nevada. Scott Cohn has the story.