Thanks to Julia C-F for this one:
This video is about an inexpensive new type of refrigeration that would be available to people who don't have electricity or stored fuels such as propane. It is important for people in developing countries to have some accessible form of refrigeration for the storage of vaccines and other medical supplies. The "sustainable fridge" utilizes thermodynamics and costs between $25 and $40. The refrigerator is about the size of a large thermos and weighs 8 pounds. It works by placing it on a fire for 30 mins and then letting it cool in the shade for 1 hour. The fridge then cools for 24 hours. I think it is interesting that we can apply something we learned in chemistry to help solve world problems. I also did not know that 1.6 billion people in the world don't have access to refrigeration or that it is so important to people's health. I hope to be able to use science to help the world someday too.