Greenpeace has been on the offensive against Apple this week, blasting the company for sourcing the power for its energy-intensive data centers from coal power plants. Today, Apple fired back with some remarkable facts, claiming it's a clean and renewable energy superstar.

War is costly stuff, and isn't doing our fine planet any favors. At least, not environmentally. By 2020 however, the US military hopes that 50 per cent of their operations will be done using renewable energy.

The supposedly world-saving wind turbine has been singled out as a potential danger by the military, as the rise of wind farms threatens national security—by creating radar "blackout zones".

The nPower PEG charger "harvests" your kinetic energy as a source of renewable power, allowing you to keep your phone or other small device running while away from outlets. Running, biking, or even just walking will keep the electricity flowing.

Spare a thought for the cows when you're surfing the net in the coming years, won't you? Their manure will be shoveled and turned into fuel, so companies such as HP can power their data centers and save the world.

During the night, this tower is an energy-generating waterfall. During the day, it creates power using large solar panels while allowing bungee jumpers to leap from level 90.5.

Ten 200 ton buoys—each measuring 150 feet by 40 feet—are being installed off the coast of Oregon to build America's first wave power farm. They'll power 400 homes by harnessing "the energy of wave motion." Worth $60 million?

As far as practical renewable energy concepts go, these wind-powered highway lights are pretty elegant. And from my layman's perspective, they seem to be practical and realistic. I like 'em! [Turbine Light via Inhabitat]

On December 16th, Google formed a new subsidiary in Delaware known as Google Energy. They then requested permission from federal authorities to buy and sell wholesale electricity. What could Google want to do with this?