File photo of a Greenpeace environmental activist in a polar bear costume holding up a banner at a Shell gas station in Prague

 
File photo of a Greenpeace environmental activist in a polar bear costume holding up a banner at a Shell gas station in Prague
A Greenpeace environmental activist in a polar bear costume holds up a banner at a Shell gas station in Prague in this May 10, 2012 file photo. REUTERS/David W Cerny/Files