Yeah it’s the same website, does that matter though? The link I added was an interview with head of the German Animal Welfare Association and his views and experience. Even in the article you linked this passage sums up the argument:

> Such behavior, Hoeffken details, is reflected by a polar bear running or swimming in continuous circles, or repeatedly moving its head back and forth.

> Polar Bears International's Steven Amstrup has another point of view. He says that because zoos provide polar bears with their all nutritional needs - something they’d normally have to travel for in the wild, captive bears can therefore live in smaller, more confined spaces.

> "The idea that zoo animals are depressed or stressed opposes the fact that polar bears typically live far longer in captivity than in the wild," Amstrup adds.

The zoos can provide sufficient nutrition and keep polar bears alive for awhile, but is it ethical to keep them in an enclosure that makes them have psychological problems and physical tics? Just because we can keep them alive longer doesn’t mean they have a good life.