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Dec 23, 2016, 4:50 pm270 ptsGreen Car Congress
Earlier this year, the US Environmental Protection Agency (EPA) received several petitions from state and local government agencies from across the country and other organizations to increase the stringency of the on-highway heavy-duty engine NOx emission standards from 0.2 grams per brake horsepower-hour…
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Leaf through planet Earths environmental headlines in one convenient place. Read, share and discover the latest on ecology, science and green living from the web's most popular sites.