Ensia: The recent oil pipeline spill in Santa Barbara has been an unfortunate case of déj vu, bringing back collective memories of oil-slicked seabirds and blackened beaches. It came not long after President Obama approved oil exploration in the Arctic. These offer stark reminders that Americas addiction to oil is alive and well. For all our progress on clean energy, our cars and trucks remain reliant on petroleum, which still provides a full 92 percent of energy for transportation in the U.S. Environmentalists...