It's not just move-out day that's getting (a little) more eco-friendly. Colleges across the country are pouring money into new projects -- from tray-less dining halls to wood-chip power plants -- aimed at making their campus operations a little easier on their environment.

Eco-feel-goodery might just now be hitting newspaper lifestyle pages, but the sustainability movement on college campuses has been ramping up for years to reach this turning point. Plans are now underway at dozens of campuses across the country to shrink the huge, ugly carbon footprint each student leaves after they graduate.

At Oberlin, the product of this preparation is the new Student Experiment in Ecological Design house, or SEED, a co-op where eco-minded students unplug their appliances and battle over who can take the shortest shower. Harvard turns their kitchen grease into biodiesel for campus buses. And Middlebury College plans to go completely carbon neutral within eight years, thanks in part to a planned $11 million wood-chip power plant.

But any eco-activist worth their organic sea salt knows that food is where the real change needs to be made -- and luckily, that's where a lot of campuses are focusing their efforts. Many campuses are increasing the availability of local produce in dining halls and composting is catching on in a big way, but students at the University of New Hampshire are taking it a little more seriously: they actually operate their own organic farm.

But it's not just what we're eating, but how much -- and how much we're throwing in the trash. That's why Colby College and other universities are experimenting with getting rid of dining hall food trays. On days when trays aren't available, there's roughly one-third less food waste.