A demonstration against a planned waste incineration plant by thousands of residents near China’s scenic city of Hangzhou turned violent on Saturday, with police vehicles set on fire and injured protesters taken to hospital…The district government appeared to back off with an announcement stating that the project would be suspended if it did not gain public “understanding and support”. Similar promises have defused public demonstrations against plants producing the petrochemical paraxylene, although in most cases work at such plants has continued...The project, by Hangzhou Chengtou Group, a city-owned infrastructure company, would be the largest waste incinerator in Asia if completed. Its first phase would process about 3,000 tons of waste a day, or roughly one-third of the city’s rubbish…[C]ity governments running short of places to bury waste tend to favour the projects…“We are worried that the waste incinerator will pollute the air and contaminate the water supply,” said Ai Binke, who lives in the city...