Apple employees remove balloons, after Greenpeace activists inside the Sandton iStore release black balloons symbolizing electricity produced by coal fired power stations. The activity is part of a global day of action at Apple stores around the world. Greenpeace played off Apple’s “genius bars” by setting up their own “Supergenius bars," where people were encouraged to take part in the campaign. Greenpeace is calling on Apple to power its massive data centres with renewable energy instead of coal.