Wildfires bring to mind a blazing sea of flames. But what happens to the smoke? Anyone observing a wildfire from a safe distance notices mainly the enormous clouds that tower above the fire. These rise several kilometers and then embark on journeys that can extend across continents and oceans. Pollu tants from wildfires in Canada can still be detected, for example, at the Jungfraujoch in the Swiss Alps. ...read more read less