Look at a glass of milk, and you might not think there's much to it. It's white, it's available everywhere, and it comes by the gallon. But hiding behind many of the labels and homogenized gallons are a myriad of green issues that can make it tricky to navigate all the choices that go with finding a green glass of milk. So, how can you be an eco-friendly milk consumer?

Like any green consumer choice, there's more than meets the eye. Most often, the milk we consume is an animal product, and so that requires lots of energy inputs, treatment to get it safely (and legally) from farm to market, and finally packaging and shipping the stuff. So there's a lot to think about, and a lot of gray area, with each little glass of the white stuff.