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Great Lakes Echo (https://greatlakesecho.org/2011/02/24/here-is-a-stream-of-money-if-you-can-navigate-a-stream-of-urban-water-data/water-drop-michael-melgar-via-wikimedia-commons/)

Water Drop-Michael Melgar via Wikimedia Commons

Published February 24, 2011 at 500 × 556 in Here is a stream of money if you can navigate a stream of urban water data

Photo: Michael Melgar via Wikimedia Commons.