User:Iriswang/Pollution in the Yangtze, Pearl and Yellow Rivers

China's three great rivers---the Yangtze, Pearl and Yellow River---are so filthy that it is dangerous to swim or eat fish caught in them. Parts of the Pearl River in Guangzhou are so thick, dark and soupy it looks like one could walk across it. Industrial toxins were blamed for turning the Yangtze an alarming shade of red in 2012. In recent years pollution has become a problem on the Yellow River. By one count 4,000 of China's 20,000 petrochemical factories are on the Yellow River and a third of all fish species found in the Yellow River have become extinct because of dams, falling water levels, pollution and over fishing. More than 80 percent of the Hai-Huaih Yellow river basin is chronically polluted. In October 2006, a one kilometer section of the Yellow River turned red in the city of Lanzhou in Gansu Province as result of a “red and smelly” discharge from a sewage pipe. In December 2005, six tons of diesel oil leaked into a tributary of the Yellow River from a pipe that cracked because of freezing conditions. It produced a 40 miles long slick. Sixty-three water pumps had to be shut down, including some in Jinan, the capital of Shandong Province. The Yangtze River is polluted with 40 million tons of industrial and sewage waste. Half of China's 20,000 petrochemical factories lie on its banks. About 40 percent of all waste water produced in China---about 25 billion tons---flows into the Yangtze, of which only about 20 percent is treated beforehand. The pollution has taken its toll on aquatic life. Fish catches from the river declined from 427,000 tons in the 1950s to 100,000 tons in the 1990s. The Yangtze is in danger of becoming a “dead river” unable to sustain marine life or providing drinking water. According to report by the Chinese Academy of Sciences released in April 2007 the Yangtze is seriously and largely irreversibly polluted. More than 600 kilometers of its length and almost 30 percent of its major tributaries are in critical condition. Sections of the Grand Canal that have water deep enough to accommodate boats are often filled with trash sewage and oil slicks. Chemical waste and fertilizer and pesticide run-off empties into the canal. The water is mostly brownish green. People who drink it often get diarrhea and break out in rashes.