In rural Indian dairy villages, access to electricity is intermittent. Most people have to boil milk before they drink it, and dairy farmers face the perpetual risk of losing large batches of their product. Now Promethean Power's new thermal battery tech offers a fascinating solution.
As Doc North explains in the video, milk can be chilled to maintain its quality without electricity, by using simple principles of heat exchange.
If using science to solve real-world problems gets you jazzed, you should check out some of Doc North's other videos, too -- he's currently travelling across India, showcasing technologies and ideas that are changing people's lives in awesome ways. [In The Making.]
Top image via Andrew Magill / Flickr