Zachary Karabell, president of River Twice Research, says that aside from the solar sector there are few pure-play companies in the green space, which makes ETFs a natural entry point for new investors.
Forget the Green Monster. Check out the green roof. Major League Baseball's reigning champion is using solar panels and other green technology in its historic Fenway Park.
A wild shrub called Jatropha curcas may be the perfect biofuel crop. It's cheap and easy to grow, more energy efficient than corn and carbon neutral. And since Jatropha is inedible, no one will go hungry if it's used for fuel.
All three of the presidential contenders are committed to a cap-and-trade system to address greenhouse gases, but there are big differences in the details.
His Mesa Power company places a major turbine order to power a proposed $10 billion wind farm in the Texas Panhandle. "Renewables are coming in," says Pickens. "I wanted to be in on it."
Big cities have big trash. But in California, Norcal is transforming much of that trash into profit as the recycling company expands to include construction materials and composting.
NBC Universal's new initiative to bring an environmental perspective to our networks, our platforms, our audiences, our communities ... in fact, to everything we do.
Oil giants like Exxon and Chevron are talking about ways they're trying to make the world a cleaner, greener place. CNBC's Melissa Lee takes a look at whether this is a serious effort or just greenwashing.
Simran Sethi goes on top of a roof in Monroe, NJ, to watch 3,000 solar panels turn a Staples distribution center's electric meter backwards. Meet the solar installation engineer who made it all possible.
As food inflation continues and preservatives are used to maintain freshness, the People's Grocery is bringing healthy food from urban gardens to the local food chain and providing jobs in the process.