Xiaonanhai Dam upstream from the Three Gorges Dam. Weng Lida, a former director of the water resources bureau at the Yangtze River Commission, said that senior China Three Gorges executives had succumbed to pressure from the Chongqing authorities. According to the "South China Morning Post", Chongqing's success in overcoming all major obstacles to the dam's construction is attributed to the personal intervention of Bo. The project was strongly opposed by environmentalists, who saw it as a "politically motivated decision". It was highly controversial due to the environmental impact, the high cost-benefit ratio, as well as the secretive decision-making process under Bo. A
Three Gorges Dam by 190 million tonnes, sulfur dioxide by 2.29 million tonnes, and nitrogen oxides by 980,000 tonnes. The dam increased the Yangtze's barge capacity sixfold, reducing carbon dioxide emission by 630,000 tonnes. From 2004 to 2007, a total of 198 million tonnes of goods passed through the ship locks. Compared to using trucking, barges reduced carbon dioxide emission by ten million tonnes and lowered costs by 25%. Two hazards are uniquely identified with the dam. One is that sedimentation projections are not agreed upon, and the other is that the dam sits on a seismic fault. At current levels, 80% of