Satellite imaging showing how much this years cold winter held back plant growth

Thanks to the Woodland Trust for this short video showing how much later plant growth started this year compared to 2009. Monitoring devices on the European Space Agencies' ENVISAT  satellite record plant chlorophyll production. http://www.naturescalendar.org.uk/findings/commentary  TIP:- Use the 'four arrows' button to view full screen and the pause button to slow the sequence down.  (note: -the audio quality is poor)