There is an interesting (funny) story on CNET about how divorce is partly to blame for global warming

Divorced couples use up more space in their respective homes, which amounts to to 38 million more rooms worldwide to light, heat and cool, noted the report.

And people who divorced used 73 billion kilowatt-hours more of electricity and 627 billion gallons of water than they would otherwise in 2005.

Dissolving a marriage also means doubling possessions, from the lowly can opener to the SUV. The report, however, did not estimate how many more natural resources the children of shared-custody parents consume by getting birthday and holiday gifts twice.