<p><span style="color: #333333; font-family: arial, sans-serif; font-size: 14px; line-height: 19px;">The sound of running water —&nbsp;<em>clean</em>&nbsp;running water — is not one you have always been able to hear in the ramshackle lean-tos that pass for homes on the edge of Phnom Penh, the capital of Cambodia. <a href="http://www.npr.org/2011/06/02/136394058/phnom-penhs-feat-getting-clean-tap-water-flowing?" title="Article">More</a> (Source: National Public Radio)</span></p>