3/7/2014

Trash collection has come a long was since the ancient Romans created the earliest known landfill site. Companies such as Republic Services and Waste Management still make money by hauling waste to landfills, but they're also increasingly finding ways to generate profits by recycling waste or running waste-to-energy facilities. "We want to provide services that our customers demand, and to the fullest extent possible create business models that are sustainable," says Republic recycling chief Peter Keller.

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