The main Business 2.0 article, "Go Green, Get Rich" is a short introduction to nine other articles.

"But before you get too depressed, consider that business - until now part of the problem - is scrambling for answers. Clean-technology investments soared by more than 50 percent in the first three quarters of 2006."

That 50-percent figure comes from an analysis by Dow Jones VentureOne and Ernst & Young, which puts cleantech investments at over $750 million in the first three quarters of 2006.

Many investors dabble in green investments, these days. KPCB is dabbling in a serious way. The VC firm has thus far increased its renewable-energy fund from $100 million to $200 million. They're getting plenty of media attention for what is a relatively small amount of money. Here's what Kleiner partners John Doerr and Ray Lane told the Wall Street Journal in "Kleiner's Green Investment Machine" --

"This is bigger than the Internet, I think by an order of magnitude. Maybe two. I'm taking the entire energy industry. You can boil it down to two simple contributors. One is transportation fuels... And the other is electricity generation."

Among the solutions detailed in this Business 2.0 series: How Ireland's Airtricity plans to displace power plants with wind turbines; why Westport has spent a decade developing HPDI, a conversion technology that allows diesel engines to run on liquid natural gas; and how Canadian PyroGenesis uses plasma arc gasification to jolt solid waste, breaking it down into valuable resources, including syngas for power plants.