A new study suggests that divorce negatively impacts the environment. Apparently, water and electricity use increases when couples split up and house fewer people. This makes complete sense and most people would not have needed a study to prove such a hypothesis. Economics, anthropology and plain common sense explain that marriage was created as a means to better allocate resources and aid procreation. It should come as no surprise when divorce is linked to inefficient resource use.
I will surmise, while playing amateur sociologist, that in a modern society marriage is not as important a means to such success. Thus, we seem to have higher divorce rates today because it is not as necessary for survival. But that's just an Alabama divorce lawyer's two cents on the matter.