The Guardian Cutting toxic air might prevent millions of people getting depression, research suggests. Story here. Smoke from wildfires in Alberta, two provinces away, blankets Manitoba - 2018. A PinP photo. Here's a related story of mine that you might enjoy. " Re-thinking extinctions " New research suggests that pollution may be playing a bigger and more ominous role in pushing many of Canada's plants and animals to the brink than earlier thought. Larry.