Described are the methodology, database and example projections to the year 2020 of the cumulative emissions from diesel locomotives in Canada for a range of freight and passenger fleet activity profiles. The emissions include both the criteria air contaminants (CAC) harmful to human health and the principal greenhouse gases (GHG) covered by the Kyoto Protocol to the United Nations Framework on Climate Change. The projections show a continuous reduction in emissions intensities to 2020 as the Canadian railways acquire new locomotives meeting U.S. EPA Tier 2 and Tier 3 emissions limits to accommodate both increased traffic and units being retired.

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