ADJ [ADJ n]棕色地带（指城镇中曾经兴建过房屋或工厂而现今废弃不用的土地）Brownfield land is land in a town or city where houses or factories have been built in the past, but which is not being used at the present time. 棕色地带（指城镇中曾经兴建过房屋或工厂而现今废弃不用的土地）
By 2005 he wants half of all new houses to be built on previously developed land: so-called brownfield sites.