One man's waste is another man's treasure. In this case, the waste is the kind produced by people and researchers at the University of Calgary say a pilot project testing the city's water is providing a valuable tool in the fight against COVID-19. "It's similar to how detectives look for DNA evidence at a crime scene. We're looking for the RNA signal that the virus that causes COVID leaves behind in the wastewater," said Kevin Frankowski, co-leader of the COVID-19 wastewater monitoring project at the university's Cumming School of Medicine.