A canary in the coal mine story from Wood Buffalo National Park with a lesson for all protected areas. We are not immune to pollution and other sorts of trespass. https://www.thestar.com/news/canada/2018/07/15/almost-every-part-of-canadas-largest-national-park-is-deteriorating-study-says.html

(photo credit – http://www.canadianparks.com/alberta/woodbufnp/index.html)