File photo of a T-shirt of a Greenpeace environmental activist next to gas pumps at a Shell gas station in Prague

 
File photo of a T-shirt of a Greenpeace environmental activist next to gas pumps at a Shell gas station in Prague
A T-shirt of a Greenpeace environmental activist is seen next to gas pumps at a Shell gas station in Prague in this May 10, 2012 file photo. REUTERS/David W Cerny/Files