»smoke«

Pictures of the Omi instrument at Nasa's Aura satellite show the smoke level over Europe. Actually, the instrument adds up all the nitrous oxide in an air column of 10 km above ground. As estimated levels above industrial hot spots are highest. Red is high concentration. Image (c) KNMI
[Correction: The data-processed picture of 14. December does not show the smoke plume of the oil tank fire near London. Investigator Richard Friebe was told that scientists who do the data-processing and modelling of Omi satellite data may not track the smoke plume of the fire.]