1.   More recently, the dam has become a centerpiece of propaganda efforts to establish Jiang as the successor to Mao and Deng, who died in February.

2.   The dam has become a centerpiece of propaganda efforts to establish Jiang as the successor to Mao and Deng Xiaoping, who died in February.

3.   The dams also have become an issue in the presidential race.

4.   Officials here complain that concerns by green groups are unfounded and that hydropower dams have become like a red rag to a bull for environmentalists.