In a new report, BP states that wind, solar and biofuel consumption will outpace demand for fossil fuels over the next 20 years, rising from 1 percent to 6 percent of total energy...

This McKinsey article describes five technologies that could start arriving in earnest by 2020 or so: grid-scale storage, digital-power conversion, compressorless air conditioning and electrochromic windows, clean coal, and electrofuels and new biofuels.

State governments led the nation's initial responses to the challenge of energy system transformation a decade ago and since then have developed a broad array of cleantech development tools, ranging from financial support tools and net metering to incubators, cluster supports, and workforce training.

Companies more than doubled their investments in mergers and acquisitions in 2011.

Iowa based biodiesel fuel company Renewable Energy Group Inc , is set to go public on Thursday and will be the first U.S. initial public offering in 2012.

Despite lackluster sales, hybrids and electric cars were a dominant part of the scene at Detroit’s auto show.

Renewable energy investment rose 5 percent to $260 billion in 2011, following 31 percent growth in 2010 and 1 percent in 2009.

Because of its tariff incentives, Germany has become the world’s largest solar market by installations.

The governors of Virginia and New York outlined their clean energy goals in '12, laying out aggressive targets for solar and wind.

Airlines that do not follow a new European regulation on greenhouse gas emissions could find themselves banned from European airports.