Nitrogen Dioxide Levels from July 7 through 12, 2011 in Central Africa (image) NASA/Goddard Space Flight Center Share Print E-Mail Caption This image from the OMI instrument on NASA's Aura satellite shows nitrogen dioxide levels from July 7 through 12, 2011 in central Africa pertaining to agricultural fires. The highest levels of NO2 appear as a dark red butterfly over the southern Democratic Republic of the Congo. The NO2 is measured by the number of molecules in a cubic centimeter. Credit NASA/James Acker Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.