Patagonia's delicate ecosystem is under threat from overgrazing. But the region, at the southern end of South America, is getting help from two former business magnates.

An American couple, Douglas and Kristine Tompkins, used most of their fortune to buy a former sheep and cattle ranch which is soon to be donated to Chile as a national park.

Al Jazeera's Lucia Newman reports from the Chilean Patagonia region of Aysen.

Source: Al Jazeera