At some colleges, no longer are students able to pile their trays with french fries, brick-oven pizza and brownies. Instead, they have to dish up their cafeteria favorites on to a single plate.

The change makes sense. Trays are large and leave too much room for students to pile on several plates of food as they walk through the buffet lines. And when it’s time to dump the tray’s contents, more than half of the food is wasted into the trash can.

After Virginia Tech went trayless, food service workers at the school noticed an immediate change.

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