“It doesn’t take many people—or very many sheep—to deforest a whole country over 1,000 years.”

That’s Þröster Eysteinsson, the director of Icelandic Forest Service, in a video selected by National Geographic’s Short Film Showcase. In the optimistic five-minute short, Eystenisson explains the efforts to restore woodlands in a country that is, in his words, “certainly among the worst examples in the world of deforestation.”

video “Iceland Is Growing New Forests for the First Time in 1,000 Years”