http://news.bbc.co.uk/1/hi/world/europe/3937403.stm
http://news.bbc.co.uk/1/hi/world/asia-pacific/6172360.stm
http://www.independent.co.uk/news/world/asia/one-third-of-fish-species-in-yellow-river-dead-432776.html
http://www.guardian.co.uk/environment/2008/nov/25/water-china