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NanoH20, a water purification start-up, has raised $60.5 million in venture funding and bank loans. Investors see big opportunity in water as the world population grows.

According to a Civil Society Institute survey, 76 percent of Americans believe the U.S. needs to find a way to rely more on renewable energy sources and over 80 percent feel that water shortages and the availability of clean drinking water are key concerns.

Morgan Stanley and Main Street Power Co. are teaming up to provide funds for Clean Power Finance Inc.’s customers to install up to $300 million in residential solar energy projects.

Absent Congressional action, clean tech policy support will drop from a peak of $44.3 billion in 2009 to $11 billion in 2014, a 75 percent decline, according to a Brookings report. In the report, the authors propose new energy policies that will secure subsidy independence for clean tech markets as rapidly as possible.

Investors believe that the “clean web” is driving innovation and providing a needed boost to the industry overall.

Harvest Power, a start-up that coverts organic waste to energy, has raised $110 million in a Series C round.

Goldman Sachs Group’s global head of the clean technology believes that clean technology is now in the early stages of a strong recovery, the same way the technology sector flatlined...

BrightSource's decision to shelve its planned IPO may be a sign that alternative-energy firms may not be welcome in the stock markets.

In order to combat increasing consumer power bills, Italy is capping renewable energy subsidies by $3 billion per year.

The White House announced that the U.S. military will deploy 3 GW of renewable energy, including solar, wind, biomass and geothermal, by 2025.