Oregon uses gasoline made from Alaska crude; that oil is high in benzene.  Gasoline burned in Oregon cars and trucks releases benzene into the air; benzene is a carcinogen.  Jared Ishkanian with the Oregon Environmental Council says a new law is now in effect to lower benzene levels.  In pushing the law, Senator Ron Wyden noted the cancer causing emissions have a disproportionate effect on minority and low-income populations.