Inventors search for 'missing link' in renewable energy
GOLDEN, Colo. — What may become one of the most disruptive renewable energy experiments in recent history is taking shape behind a building here in an assemblage of girders, pipes and tanks. It's called a bioreactor, but has the look of an unfinished project built with pieces from a giant erector set.
Exposing the oceans' climate change secrets
In the 1990s, scientists were scrambling to fill a huge gap in the systems that measure the Earth's warming climate. Space satellites suggested the missing pieces might be found in the vast expanses of the world's oceans, which store more than 90 percent of the heat the planet receives from space.
Say cheese. Experts want a better global picture for CO2
Smile. This is the year we begin to debate a planetwide selfie showing the impacts of climate change.
'Wake' mystery is mostly fixed, helping turbines best coal
In 2007, two reports laid out a stark but baffling problem: invisible wakes of turbulent air created by the turbines in the front of an offshore wind farm robbed power from the turbines built behind them. But the problem has spurred years of research both in the United States and abroad to maximize wind power's efficiency.
Xcel learns to forecast wind, then shuts coal plants
Wind power has long seduced some U.S. utilities. Unlike coal, natural gas or diesel power, the wind is free. But learning how to forecast its force, and then handle it, has been a major hurdle for power companies. Few utilities have invested more in solving that conundrum than Xcel Energy Inc.