In the United States (U.S.) in 2005, divorced households spent 46% and 56% more on electricity and water per person than married households. ... Furthermore, U.S. households that experienced divorce used 42–61% more resources per person than before their dissolution.The study said if divorcees in the U.S. were as resource-efficient as married households, they would have saved over 627 billion gallons of water in 2005 alone. I bet that's more than hotels save by skimping on bath towel exchanges.
No word yet if conserving marriage will be promoted as an environmentally virtuous act.