The author of this optimistic commentary from the International Herald Tribune, compares the growth rate of renewables to that of petroleum a century ago. Petroleum accounted for 2 percent of total commercial energy but expanded quickly in niche markets. “We are seeing the same kind of growth in Renewables”, he explains, “with wind and solar power markets now doubling in size every three years. Only sectors like cell phones and the Internet have growth rates comparable to those of renewables today”.

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