One mile on a bike is a $.42 economic gain to society, one mile driving is a $.20 loss | Grist
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One mile on a bike is a $.42 economic gain to society, one mile driving is a $.20 loss | Grist
One mile on a bike is a $.42 economic gain to society, one mile driving is a $.20 loss | Grist
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Most Recently Shared on April 2, 2012 at 12:07 pm By:
One mile on a bike is a $.42 economic gain to society, one mile driving is a $.20 loss | Grist http://t.co/rGBAK6mV
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