Three Gorges Museum large reliefs, and 1-km (1,094 yards) long "Ecological Corridor". The museum covers an area of 42,497 m (c. 50,828 square yards). The exhibition hall covers 23,225 m (c. 27,778 square yards). There are four main displays: Further displays include: Another major exhibit is a 180° panorama of wartime Chongqing when it was the provisional capital of Free China and was subjected to Japanese bombardment. There is also a 360° cinema showing the natural and social scenery of the Three Gorges before the dam was constructed. A 1st-floor exhibition on the Three Gorges includes a model of the Three Gorges Dam.
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