The U.S. Environmental Protection Agency (EPA) has released emissions “rankings” for all light vehicles based on “EPA emissions standards that the vehicles have been designed to meet throughout their lifetime.” The voluminous data is available at: All vehicles are ranked from 0 (worst) to 10 (best), which puts relatively light cars with maximum use of catalysts and “light” hybrids at the top and the heaviest, large-engine vehicles generally at the ...

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