In fact the copy is way too long for a billboard.
But it was still clever enough to get it rejected by Canada's largest outdoor advertising company.
It seems the company didn't give one.
But given the ad is in response to a recent oil pipeline spill I'd imagine that a global conglomerate may (or may not) have had a quiet word with the poster company.
I doubt Greenpeace will be all that unhappy though as the media for the poster was going to cost them around $3,000.
A pittance compared to the free publicity the 'banning' of the ad has received.