Greening Up the World's Cell Phone Towers

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Within five years, something like 5% of the world's cell phone tower base stations will be powered by one form or another of green energy. If that doesn't sound like much, the figure's just 0.11% today. And with cell phone use growing, the number will be significant.

A new report today from Pike Research (a "market intelligence" business that specializes in green tech) is the source of this data, and the raw figure is actually that by 2014 4.5% of the cell phone base stations dotting the...