A New Vision for Refrigeration
Here is a video of Adam Grosser at TED explaining the idea behind his refrigeration device that doesn't need electricity and can be made inexpensively for the developing world. It's kind of like the One Laptop Per Child version of the fridge. The video is only 3 minutes and a half long and worth watching. You can see a high resolution version here. You can learn more about Adam on his bio page at Foundation Capital.