The war had left many old houses empty or ruined, and some cities reconstructed these areas or built new areas to solve housing issues and improve the environment of the original city.

因为战争等原因，欧洲很多老房子空置或破败，为了解决住房问题、改善老城环境，一些城市开始了旧城改造和新区建设。

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Dave shows me a new housing estate, built over the old Treeton Colliery.

BBC: News Online

However, other colliery sites in the area are gradually coming back to life, often as business parks, nature conservation areas or in the case of the old Ollerton pit site, an "energy village" of housing, offices and light industry all built along environmentally conscious lines.

BBC: NEWS | UK | Watching the pits disappear