When did the pollution of the Yangtze River begin?

Pollution of the Yangtze River began to escalate significantly in the late 20th century, particularly during the rapid industrialization and urbanization of China in the 1980s and 1990s. Factors contributing to this pollution included industrial discharge, agricultural runoff, and population growth along the river's banks. By the early 2000s, the river was facing serious environmental challenges, leading to increased governmental awareness and efforts for remediation.