The idea:

We created a pinboard “To save the Arctic is to save a great deal more” on Greenpeace Spain’s official Pinterest page

An interactive element in itself, in which each comment that was added served to keep threats away on the board

“EACH MESSAGE OF SUPPORT HELPS TO KEEP THE THREATS TO THE ARCTIC AWAY”

And each SMS received served to do the same in real life

“EACH SMS YOU SEND DOES A LOT MORE: TURN THE ARCTIC INTO A GLOBAL SANCTUARY AND PROTECT IT FOREVER”