This data visualization shows high levels of carbon monoxide spreading east from Central Canada, where large fires burned throughout July 2010.
Published Aug 9, 2010A ribbon of smoke snakes across western Canada in this true-color image from August 2, 2010.
Published Aug 3, 2010A river of thick smoke poured across central Canada on July 14, 2010.
Published Jul 15, 2010Gray-brown smoke stretches across a broad swath of western Canada in this true-color image from July 13, 2010.
Published Jul 15, 2010