by Geoff Dembicki
| Mar. 23, 2011
Koch Industries processes one in four barrels of U.S.-bound Alberta tar sand, while pumping millions of dollars into highly conservative, anti-green causes.
Flint Hills Resources, a fully owned Koch subsidiary, operates a Minnesota refinery capable of processing 320,000 barrels of crude a day, about four-fifths of which is sourced from Alberta.
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