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The 2012 Knight News Challenge is looking for a few good journalism projects to receive $5 million in funding... but applicants share their ideas with Tumblr's user base

In cities where the water coming from pipes is anything but reliable, a new service alerts people so they don't have to sit at home all day waiting for the tap to turn on. In many cities in developing countries, residents have piped water supplies. But there's a catch: the water is only available through the pipes for a few hours at a time, and people have no way of knowing when that will be