The longest river in China is facing an environmental disaster. Due to increased industrial and agricultural development along its banks, it is, by some accounts, becoming a "dead river." This means plant and animal life in it are disappearing. More troubling still is the lack of clean drinking water available from it, something on which millions of people in major cities depend. After reading the above passage it is clear that the health of many people in China is threatened by A: increased air pollution.
B: the pollution of the Yangtze River.
C: destruction of the inland rain forests.
D: irrigation problems along the Ganges river.