Christian Science Monitor: For the first time, oil prices have nosed above $100 a barrel. Gasoline is higher by 73 cents a gallon from a year ago. In past decades, such price jumps brought a knee-jerk reaction to conserve or to find more oil. The world has done both. Yet prices continue to rise. So what’s left to do? Congress tried to mandate more conservation last month when it insisted on better fuel efficiency in automobiles (from 25 to 35 miles per gallon by 2020). But some evidence suggests that better …