Is Divorce Bad for the Environment?

From today's Washington Post:

Divorce is not just a family matter. It exacts a serious toll on the environment by boosting the energy and water consumption of those who used to live together, according to a study by two Michigan State University researchers.

The analysis found that cohabiting couples and families around the globe use resources more efficiently than households that have split up. The researchers calculated that in 2005, divorced American households used between 42 and 61 percent more resources per person than before they separated, spending 46 percent more per person on electricity and 56 percent more on water.

Their paper, published yesterday in the Proceedings of the National Academy of Sciences, also found that if the divorced couples had stayed together in 2005, the United States would have saved 73 billion kilowatt-hours of electricity and 627 billion gallons of water in that year alone.