It’s easy to take that hulking great white beast of a machine in our kitchens for granted, but for the 1.3 billion people in the world who are living without electricity, a working refrigerator is not an option. So a team of students in Canada has invented a cooling device that not only works without any electricity whatsoever, it’s also cheap and portable, making it ideal for those in remote and rural areas who struggle to keep their produce fresh.
sciencealert
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