Satellites take sustainability to new heights   Aerial view of Muskeg River Tank Farm, Alberta, Canada. Eyes in the sky     Envisat's ASAR false colour composite images showing the development of oil sand activities at Albian Sands Energy Muskeg River Mine and Shell Jackpine Mine. ASAR acquired the images on 13 October 2004 and 13 September 2006.   Land cover classification for the Lower Athabasca oil sands region, developed using ESA's Envisat data, acquired on 25 June 2006 with its optical instrument, Medium Resolution Imaging Spectrometer (MERIS). Release date: 19 January 2009