April 22, 2015
Special | 25m 19s | Video has closed captioning.
St. Louis’ combined sewer system does not meet environmental standards. Why the Metropolitan Sewer District is digging tunnels and planting gardens to address the issue. Some tech designers are creating tablets custom-built for grandparents. Jim Kirchherr talks via Google Hangouts with the PBS NewsHour’s tech-savvy Hari Sreenivasan about the fast pace of change in science and innovation.
Aired: 04/21/15
