Thanks for the off-list responses everyone. Several of you wrote to confirm my suspicions that essentially all distance masters-level programs are worthless for those considering moving on to PhDs (though skills gained there may still prove marketable in the workaday world). Additionally, I've been warned off of the (underresourced?) Energy Policy and Climate program at Johns Hopkins University and encouraged to explore the online certificate program in Conservation Criminology at MSU, which includes environmental justice concepts: http://www.conservationcriminology.msu.edu/teaching/online.php
Armed with more/better info than I had a short bit ago. Enjoy the rest of your break.
Indebtedly,
G