Waste heat, the byproduct of all kinds of machinery and processes, has long been seen as a potential source of energy - if only the capture-and-convert process could be made more efficient.
It's all about the mission. That's been the overriding message from the various branches of the U.S. military as they pursue renewable-energy solutions - and Marines in Afghanistan are providing real-world evidence to back that up.
If the U.S. is going to go for high-speed rail, it would make sense to focus on those corridors with the potential to transport the most people.
It's the end of an era in Los Angeles, where the city's Metro system reports that it has retired its last diesel bus.
A new 30-year analysis has found that the northern hemisphere's loss of reflectivity due to snow and sea ice decline is more than double current estimates.
A Michigan man, taking a design cue from nature, might be onto a better way to harness the power of waterways across the globe.
Among the rental car companies, Hertz has been making the most noise lately about getting electric vehicles (EVs) into its fleet, but Enterprise just managed a small coup: The company announced it would be first to offer the Chevy Volt extended-range EV for rental.
The EU's road train project, Sartre, has undergone its first real-world tests in Sweden.
When the grid teeters during summertime heat spikes, it's air conditioners that are doing a lot of the damage.
Now Hitachi is aiming to offer a distributed way to lessen the load, developing what it calls a Solar Activated Air Conditioning System.
After years of planning, IBM's learning, human-aware computer Watson was put to a competition like no other - a match of Jeopardy against quiz show heavyweights Ken Jennings and Brad Rutter. The result - Watson won. Barely.
Downsizing the solar bag to fit evolving needs, Eclipse Solar Gear is out with a padded, tablet-sized case equipped with a flexible thin-film solar panel that the company says will provide up to 4 watts of power to recharge your mobile devices.
Smart homes and smart buildings rely on a host of wireless sensors, each of which require a small but consistent power supply.
Sure, a lot of big-shot auto execs believe sales of traditional gas-powered vehicles will peak before 2020, and are focusing their energies on electric vehicles (EVs) instead. But what do ordinary Americans believe when it comes to EVs?
Many people are increasingly aware that the traditional incandescent light bulb is on life-support, and IKEA, it seems, has decided to pull the plug.
California's energy policies aimed at curbing greenhouse gas emissions are making plug-in hybrid vehicles uneconomical.
Ford didn't make its plug-in C-MAX Energi roll out on the runway at the North American International Auto Show all alone.
Last year tied with 2005 as the warmest year on record, according to data from the National Oceanic and Atmospheric Administration (NOAA).
Solar-powered microelectronics? Not unusual.
But a solar-powered microchip with no battery - that is to say, a chip with the solar cell integrated into it and running directly off available light - now that's a breakthrough.
Four Loko, the blend of alcohol, caffeine, and what tastes suspiciously like antifreeze, has often been described as "motor oil" by those who have had the pleasure of drinking it.
Noting that some 3 billion USB-enabled devices shipped in 2009 - and that the figure could rise to 4 billion - Duracell announced a new line of portable power inverters and laptop power adapters ready to fire up the gizmos.