How has pollution affected the rivers and lakes of the Yangtze River basin?

Environmental degradation in the Yangtze River basin has intensified significantly due to rapid economic development since 1950. Pollution levels in the region's rivers and lakes have risen as a direct consequence of this growth.1

The primary drivers of this pollution include:

• Industrial and Municipal Waste: Urban centers frequently discharge untreated sewage into waterways, effectively using rivers as open sewers. Additionally, industrial facilities release chemical wastes that can alter biological activity and increase water acidity, threatening aquatic life.2
• Agricultural Runoff: The extensive use of fertilizers containing nitrates and phosphates leads to eutrophication. This process triggers excessive algal blooms, which deplete oxygen levels in the water and can lead to the death of fish and other organisms.2
• Environmental Alterations: Beyond chemical pollution, human activities such as overgrazing and deforestation have increased silt loads in the middle and upper basins. Furthermore, land reclamation projects have reduced the surface area of lakes and wetlands, which are vital for maintaining ecological balance.1

These combined pressures pose a severe threat to the basin's biodiversity, endangering species such as the Chinese alligator, the finless porpoise, and the Chinese sturgeon.1