No new industrial projects will be approved in several cities and industrial parks along four major river systems to prevent them from being further contaminated.

为了防止更大的污染，几个城市和四大河流域附近的工业区将不再被批准新建任何工业项目。

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Since he finished studying, Smith has pushed hard to get four major projects off the ground and sold.

BBC: The business of photojournalism

Some have filed a lawsuit to block the planned demolition of four major housing projects in the city.

NPR: New Orleans' Controversial Public Housing Model