Limited Refinery Capacity = High Gas Prices

There hasn’t been a new refinery built in the U.S. since 1976, the result of extremely tight environmental restrictions, not-in-my-back-yard community opposition, and the high cost of new construction. Used refineries currently sell for about 30 to 50 percent of the cost of building a new one, so it’s cheaper to buy an old refinery and upgrade it. Or squeeze a little more gasoline out of the refineries you already own.

Read about it here and here.