As if we weren't experiencing enough guilt each time we bite into a big juicy hamburger, now there's another negative consequence to think about.

Commercial charbroilers--that ones that cook our burgers--emit twice the amount of pollution as diesel trucks, according to a study by UC Riverside (UCR).

"For comparison, an 18-wheeler diesel-engine truck would have to drive 143 miles on the freeway to put out the same mass of particles as a single charbroiled hamburger patty," said Bill Welch, the principal engineer for the study...

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