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Give us - or rather the PICNIC Green Challenge - your best climate-friendly, greenhouse-gas-cutting idea, and it could be worth a $750,000 cash prize sponsored by the Dutch Postcode Lottery.

While that may seem like an offbeat organization to be dabbling in eco-entrepreneurship, it's no joke. Last year's winner Igor Kluin (pictured above accepting his prize) revved up his company Qurrent with prize winnings, and is well on his way toward launching a system for connecting and managing local area networks of renewable energy...