Dalhousie researchers use LED light on municipal sewer system
Powerful LED light is being used to kill viruses and bacteria in a municipal sewer system. As Brett Ruskin reports, it's being led by a team at Dalhousie University in Halifax.
1:25
2:08
2:21
2:07
1:58
1:10
1:12
0:32
3:39
3:33
