EARTH Western Europe -- 18 Apr 2003 -- A mixture of dust from the Sahara Desert, air pollution, and smoke lingers over the Atlantic Ocean (left). This image shows numerous fires (red dots) burning in the United Kingdom (left of center) and the Republic of Ireland (farther left). A few scattered fires are burning in other parts of the image. Also visible in this MODIS image is Denmark, Belgium, The Netherlands, Sweden and parts of Norway -- Picture by Lightroom Photos / NASA