A Windsor-based engineer said climate change is taking a toll on the health of the Great Lakes and this could in turn have an impact on the quality of drinking water for millions of people. Saad Jasim, who is also president of the International Ozone Association, said the impact of climate change on the Great Lakes is quite visible in the form of harmful algal blooms. "But it's not just the way it looks, these algal blooms produce some fatal toxins … there are different species of those toxins [and] unfortunately only one of the species is regulated by Health Canada," Jasim told CBC Windsor.