Dan Weaver is a graduate student at the University of Toronto whose research takes him to PEARL, the Polar Environment Atmospheric Research Laboratory on Ellesmere Island, near Eureka, Nunavut.

Science Canada's ozone tracking in jeopardy Emily Chung · CBC News · Posted: Sep 16, 2011 10:39 AM PDT | Last Updated: September 16, 2011 ...

They include the Montreal Protocol, signed in 1987 to reduce ozone depletion, and the U.S.-Canada Air Quality Agreement, which was signed in 1988. They also say the cuts could also affect Canada's ...