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App Shows US, Canadian Commuters the Cleanest, Greenest Route Home

A mobile application launched in dozens of U.S. and Canadian cities on Monday measures the planet-warming greenhouse gas emissions of inner-city travel, its creators said, letting concerned commuters map their so-called carbon footprints. Mapping app Cowlines can suggest the most efficient route as well which uses the least fuel, combining modes of transport such as bicycling and walking, within cities, its Vancouver, Canada-based creators said. Some two-thirds of the world's...

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