Brownfield or brown field most often refers to Brownfield land, land formerly used as an industrial site.

Brownfield Entry in Emerging Markets
The Definition of Brownfield
Brownfield workflow and production forecast tool
Brownfield redevelopment as a smart growth option in the United States
A GIS-based decision support system for brownfield redevelopment
Woody biomass phytoremediation of contaminated brownfield land.
Arsenic mobility in brownfield soils amended with green waste compost or biochar and planted with Miscanthus.
Measuring site-level success in brownfield redevelopments: A focus on sustainability and green building
The role of liability, regulation and economic incentives in brownfield remediation and redevelopment: evidence from surveys of deve...
The interaction of heavy metals with urban soils: sorption behaviour of Cd, Cu, Cr, Pb and Zn with a typical mixed brownfield deposit