The rate of carbon dioxide emissions from new cars and light trucks in the U.S. dipped for the first time in two decades, but their overall contribution to global warming has continued to grow steadily since 1990, according to a new report released by Environmental Defense.
The report, Automaker's Corporate Carbon Burdens: Update for 1990-2005, shows that while the average carbon dioxide (CO2) emissions rate from new vehicles fell 3% from 2004 to 2005, it remained up a net 1.5% since 1990. Leading this adverse trend were America's Big Three
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