Window farms

I saw this really cool concept on NPR, called window farming.



It attempts to alleviate the problem of the lack of fresh food in cities using by growing plants using recycled bottles, air pump, tubing, and hydroponics. It looks like a pretty cool way to grow some small plants. Probably is not effective with bigger plants. I wonder how plants with extensive root systems do?

While we are on the subject of food, NutritionData is fairly comprehensive website on nutritional facts of a lot of foods, such as sunflower seeds (which I've been eating non-stop. Until I ran out. Sad.)