Watch Bill Gates drink water that used to be human poop

For years, the Gates Foundation has been looking for a machine that could make contaminated water safe to drink. More than 2.5 billion people on earth have no reliable access to clean drinking water, so the humanitarian implications of such a machine would be immense. With the Janicki Omniprocessor, the Gates Foundation thinks it's found the best way to do it, converting sewer sludge into water, electricity, and sterile ash that can be used as fertilizer. That system allows the Janicki operator to buy the sewer sludge at cost, and fund for the operation by selling electricity back to the grid. It's an ambitious plan, but the Gates Foundation may have the resources to make it work.

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