The world is full of people in need of safe drinking water and sanitation, people engineering solutions, and people who would be glad to help save lives by boosting access to healthful water infrastructure. How to connect them? WaterCredit, a microfinance program, has provided more than 100,000 small loans totaling more than $17.4 million since 2003 to families and communities to bring clean water infrastructure to homes and villages in India, Bangladesh, Kenya and Uganda. The program counts on its high loan repayment record — 99 percent since 2007 — to recycle funds into further projects. Photo by Sustainable Sanitation (Flickr | Creative Commons)