One problem is that decades of stagnant growth have limited the world's nuclear energy industry's capacity to meet resurgent demand for expertise and equipment.

But stocks are already low and resurgent demand from the freight sector will make it harder to rebuild them even if run rates remain elevated.

Like its rivals, Ernst & Young has taken advantage of resurgent demand for consulting and advisory work as revenues from traditional audits has leveled off.

For ethanol producers, the resurgent demand offers a much-needed boost to margins after years of stagnant demand due to a swing to more fuel-efficient cars.