All the videos are great, but to watch the "3 Inventions Improving Water" video, just scroll to the bottom of the post. It's very cool http://ma...

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All the videos are great, but to watch the "3 Inventions Improving Water" video, just scroll to the bottom of the post. It's very cool http://mashable.com/2015/03/23/simple-inventions-developing-world/