| http://www.w3.org/ns/prov#value | - He said that while they weren't a threat to safety, they could expand and cause leaking if not repaired.If water enters these cracks, there could be negative effects, so we are fixing them very carefully,'' Pan said at a news conference.Chinese officials say the dam will control chronic flooding on the Yangtze and produce power needed by industry.Critics say the dam is a waste of money and could
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