Greentech Media

It's a blimp, it's a balloon, it's a…wind turbine? With an eye on a $12 million second round, Magenn Power hopes to prove its airship-based technology is more than just neat pictures on a Web site.

Nevada-based Mariah Power has developed a propeller-free turbine that turns wind -- which sets the clouds a-flyin' -- into energy.

Quiet Revolution has pilot installations, a newly opened factory, a sold-out order book and $2.3 million. It claims its turbines generate 20 to 40 percent more energy for their size, compared to conventional turbines. But will all that -- and regulatory support -- be enough to make a market?

With a 21-year history, Southwest Windpower has been around the block. But after some unexpected permitting and zoning setbacks, the company says sales are growing "exponentially" and it plans to turn a profit in the fourth quarter.

In a discussion about his book, "Earth: The Sequel," Environmental Defense Fund President Fred Krupp talks about a U.S. carbon cap-and-trade system, the role of green technology and why he's hopeful.

Recent reports show that cleantech investments in ethanol, wind and solar are slowing down, though heavy investment this week shows the sector is still going strong.

The Clean Tech Open begins as UC Berkeley's greentech contest closes and the California Clean Energy Fund announces an angel fund. Will these efforts to seed innovation be enough?

The small-wind turbine maker grabs $500,000 to get its spire-shaped turbines onto the market.

As Ireland's largest utility promises to invest $16.5 billion in renewable-energy projects and technology, smart-grid company GridPoint grabs $15 million, solar installer AES Solar raises up to $1 billion and CMEA Ventures closes its largest venture fund at $400 million.

With $40 million in new funding and ready-made commercial partners, Elevance hopes to make oil-derived chemicals and products, including candles and cosmetics, from crops such as soy, canola and corn instead.

While U.K. banking giant HSBC looks to back renewable-energy projects, lighting company Luminus Devices grabs $72 million and Dutch display-manufacturing company Liquavista sees $12.5 million.

At The Wall Street Journal's ECO:nomics conference last week, a business audience picked McCain, with Obama following close behind, after campaign representatives discussed their candidates' energy platforms.

The Nobel laureate and former vice president advocates a tax on carbon dioxide emissions as the U.S. Senate continues to debate a carbon cap-and-trade system.

The San Francisco mayor wants to bring ocean-energy technology to the California coast, even if a San Francisco Public Utilities Commission-sponsored study ends up suggesting it doesn't make sense.

Michael Bauer leaves BPL Global, where he was vice president, to help commercialize greentech from Oak Ridge National Lab on behalf of Foundation Capital.

Range Fuels rakes in $100 million for cellulosic ethanol, Coskata gets $19.5 million for the same and Suntech acquires $100 million in shares of Nitol Solar.

The California governor says national environmental guidelines are needed and advocates nuclear power and a carbon cap-and-trade system for the state. He also defends big vehicles, like his famous Hummer.

Panelists at the ECO:nomics conference in Santa Barbara argue about whether climate-change activities benefit the bottom line.

As New Energy Finance uncovers which private-equity firms racked up the most cleantech deals last year, the industry continues to see more financing in wave energy, transportation, solar, carbon offsets and biofuels.

As countries pledge funds for greener policies at the Washington International Renewable Energy Conference, President Bush makes commitments that sound strangely familiar.