Aerials of Brent Spar, banner on heli pad. Greenpeace activists scaled and took up residence on the Brent Spar, a disused oil platform to stop its owner, Shell, from dumping the rusting hulk and its highly toxic contents to the sea bed. Shell's planned dump comes just one month before North Sea environment ministers meet in Denmark in June. Greenpeace remained on the Brent Spar for 27 days. North Sea