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How Much Rain Would End the Drought?

What’s the best way to get people to stop watering their lawns? Why aren’t we investing in desalination? Will we ever get used to the idea of drinking our own (recycled) pee? And most importantly, when will this drought be over? You had a lot of questions about water, so we turned to two experts to get us all some… » 7/14/15 2:00pm 7/14/15 2:00pm