Elevated concentrations of carbon monoxide trace the transport of smoke from agricultural fires across Mexico, southern Canada, and the U.S. Great Plains and New England.
The high carbon monoxide concentrations shown in this satellite-based map reflect the poor air quality seen in the central and eastern United States on June 8, 2011.
The highest concentrations of carbon monoxide, a component of smoke, are centered over large fire complexes in Russia in this image that tracks smoke transport across the Arctic.
This series of images shows high concentrations of carbon monoxide moving across the United States from the Wallow Fire in eastern Arizona between June 3 and June 6, 2011.