Brownfield redevelopment is the process of cleaning up and reusing contaminated or underutilized former industrial or commercial properties. The process typically involves environmental assessment to identify contamination, remediation to remove or contain hazardous materials, and then construction of new uses like housing, parks, or commercial buildings. Brownfield redevelopment is encouraged because these sites are often centrally located with good infrastructure, reusing them reduces urban sprawl, and cleanup removes environmental hazards from communities. However, uncertain remediation costs, liability concerns, and lengthy regulatory processes can discourage private investment, prompting governments to offer incentives.