Green VC discusses eco challenges At the GoingGreen conference in Sausalito, Calif., Vinod Khosla of Khosla Ventures offers his views on environmental challenges facing the world and how clean tech needs to deliver real results. He also criticizes the current green movement as more about style than substance. What do you think? Comment on Vinod’s analysis below.

Many people love the look of fireplaces in their homes. Having a fireplace creates a warm, inviting feel that makes visitors feel at ease, and creates a centerpiece that enhances the décor of any room. Although fireplaces are usually good for your home’s energy, there are a couple of situations where having a fireplace can actually drain the positive energy …