ESA's Envisat satellite captures thick clouds of smoke billowing from wildfires that have been raging through Greece and are threatening the capital, Athens.
These images were acquired by Envisat's MERIS optical instrument on 22 and 24 August 2009, working in Full Resolution mode to provide a spatial resolution of 300 metres and are available on the MIRAVI website.

The SCIAMACHY sensor on ESA's Envisat satellite has provided scientists with invaluable data on our planet, allowing them to map global air pollution and the distribution of the most important greenhouse gases. Earlier this year, its sights were set on our nearest planetary neighbour, Venus.