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The majority of the Earth's surface is covered in water, thus it is perhaps unsurprising that the power source of the future may lie in the water

Gas costs are soaring, but adopting cheaper ethanol is sending food costs into the stratosphere as well. What is the answer to this troubling predicament? Some say the solution is old -- very old. There is growing hope that one of the planet's most ancient organisms, algae, can be used to produce economically viable biofuel without the negative societal impact of ethanol.

Pricey crude hurts in all sorts of fiscal ways—but it could also spur crucial investment in alternative fuels

As speculative fervor continues to test the $100 mark, fears that expensive oil could spur inflation and cripple consumer spending is spreading. Pricey oil—coupled with the subprime crash, shaky credit markets, Wall Street turbulence, tensions with Iran and a feeble dollar—could be the catalyst that topples the U.S. economy into recession.