People tend to overestimate how much brown field land there actually is. And what does exist is often more suitable for commercial or industrial development an

People tend to overestimate how much brown field land there actually is. And what does exist is often more suitable for commercial or industrial development anyway. A disused power station site (for example) could be better for a data centre, distribution center or another power station than residential housing. Also, just because a parcel of land is green does not necessarily mean that it is a valuable ecosystem. Intensively farmed agricultural land can be degraded already. A well designed development will leave the hedgerows, introduce gardens and have wild areas. It can and should be better for wildlife.