Members of the public admire trees displaying their autumn colours at the Royal Horticultural Society Garden Wisley on October 26, 2011 in Wisley, England. Many deciduous trees have now changed colour as they begin to shed their leaves for Autumn. An extended period of leaf colour change has come about this year due to a warm, dry Spring prompting an early growth spurt and a premature colour change. (Photo by Oli Scarff/Getty Images)

Views towards Glen Cononish where plans have been approved by Loch Lomond National Park for the development of Scotland's first commercial Gold mine on October 26, 2011 in Tyndrum, Scotland. An application has been approved for Scotgold Resources to mine gold from Cononish near Tyndrum, set conditions have been placed on the company to minimize any long term impact to the environment. (Photo by Jeff J Mitchell/Getty Images)

Leaves display their autumn colours in Westonbirt Arboretum in the Cotswolds near Tetbury on October 26, 2011 in Westonbirt, England. The National Arboretum experiences one of its busiest times during the Autumn months as visitors flock to see the variety of colours displayed in the arboretum's tree collection. (Photo by Dan Istitene/Getty Images)