@irontoenail - That actually works even if you want to take environmental management courses in order to work for a non-profit or the government. I imagine knowing the current laws is very helpful when trying to force companies into cleaning up their act.
It isn't always companies that need the help, for that matter. The average home is also quite wasteful when it comes to environmental resources and I think that we are going to see more and more campaigns aimed towards getting the average person to try and reduce their environmental footprint.
The people who are going to be working out those campaigns will be people with environmental management degrees. It's definitely going to be a growth industry in the future.