Productive Products: Human harvesting. Algae pools. Wave power. Artificial tornados. Super kites. Tesla coils. The list reads like a high-tech version of the plagues that freed Moses' people in Egypt, but will these alternative energy concepts succeed or have the proverbial sea crash down on them? "True, many of the kookier-sounding concepts are still in deep development within large corporations, universities, and, of course, the garage. ... But projects that are further along are finding serious investors," explains BusinessWeek magazine. They also looked at the "traditional" alternative energies -- wind, solar, and ethanol.