Several cities around the world have begun refurbishing millions of lamp-posts and street-lamps from incandescent lighting to other technologies, literally halving energy costs in some cases. Oslo, Norway is one of these communities, and they’ve upgraded their 55,000 streetlights to not only provide light, but also weather and traffic monitoring systems. The entire cost of the Echelon-designed system will repay itself in only five years from energy savings.

On the opposite end of the spectrum, we’re not entirely sure Dubai is on board the green-train – seems they’re busy installing air-conditioned bus shelters.

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