The plan calls for construction sites to limit construction activity that creates large amounts of dust, as well as asks industrial enterprises to reduce emissions, during hazardous pollution days.

该应急方案规定，严重污染日时，建筑施工工地应减少产生大量灰尘的施工行为，并要求工业企业减少排放。

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Measures have been taken to limit the damage, and some tourist amenities such as parking lots destroyed. Regulations now forbid any new construction within 500 metres of the site.

相关部门已推出了措施阻止破坏继续，拆除了一些公共设施如停车场。条例还禁止在长城500米范围内新建建筑。

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So if Maple City were to establish strict laws that limit new building construction, these laws will have no effect on average housing prices.

所以如果Maple City建立限制新的高层建筑的法令的话，这种法令不会影响平均房价。

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However, the high vacancy rates that are a legacy of the recession will limit new construction through 2013 at least.

FORBES: Real Estate Forecast 2013-2014: Commercial Properties

The pessimists argue that for all its construction boom (William Penn's statue, once setting a limit to any building's height, became a relative dwarf more than a decade ago), Philadelphia is still a laggard, slowed down by a history of outdated habits and infrastructure that does not apply to sunbelt cities such as Atlanta or Houston.

ECONOMIST: City life