The U.S. utility-scale photovoltaic market is expected to grow from $1 billion in 2010 to $8 billion by 2015, according to a new report from GTM Research, with 5,400 megawatts’ worth of solar farms…

A subsidiary of NRG Energy on Tuesday said it will invest up to $450 million in a 250-megawatt photovoltaic power plant to be built by Silicon Valley’s SunPower on the central California coast.

While California has made headlines for approving seven large solar power plant projects in recent months, a solar building boom also is getting under way in neighboring Nevada.

The new Google Earth 6 virtual world software will map trees in 3D in seven cities around the world and will be used in forest conservation projects in Africa, Brazil and Mexico.

Upping the ante in the greener-than-thou sweepstakes, San Francisco is building what would be the nation’s first LEED Gold-certified airport terminal.

In an effort that could help avoid conflicts between wind energy developers and environmentalists, the federal government this week released a map that identifies breeding densities of the imperiled…

Illegal logging on Borneo island highlights the problems of designing incentives to protect tropical forests at U.N. talks in Cancun, Mexico.

The Cleantech Open startup contest offers a look at what the judges think may be the next big green thing. This year’s winner was a company that makes a light-based wastewater treatment system.

United States electricity production fell 4.1 percent in 2009, the biggest drop in 60 years. While electricity generation from coal-fired plants dropped, natural gas and wind power surged.

A coalition of environmentalists, national security advocates and budget hawks on Tuesday called for new transportation policies to lessen dependence on imported oil.

Chinese solar companies will account for nearly 72 percent of new photovoltaic module manufacturing in 2010, according to a new report.

Amonix’s concentrating photovoltaic generator stands 77 feet by 50 feet and produces 72 kilowatts of electricity.

California-based Solatube offers a system for capturing daylight at the roof level using “advanced optics” and efficiently transporting that light to a building or home’s light-deprived spaces.

Former Secretary of State Colin Powell wasn’t an obvious choice to address the green building industry’s largest gathering.

BP’s Macondo Gulf spill would be nothing compared to the effect of a drilling accident in the Arctic, Jessica Bachman reports from “the foulest place in all of Russia.”