What an ecological catastrophe

Have you seen these images? Sarajevo ski jump 1984 winter games Baseball venue at Hellenikon Olympic complex in Athens    Beach volleyball venue 2008 Beijing Olympics Swimming pool Olympic Village Athens (All images above from: http://www.dailymail.co.uk/news/article-3730579/As-Rio-Olympics-kicks-eerie-photographs-reveal-derelict-sites-past-games.html)