The terms come from the building industry , where undeveloped land ( and especially unpolluted land ) is described as greenfield and previously developed ( often polluted and abandoned ) land is described as brownfield .
Allowing more development both on brownfield sites in the city and on the green belt encircling it would increase supply ; though beloved by environmentalists and nimbys , the green belt pushes growth further into the south-east , thus damaging a larger area of countryside .
At least cheniere , like other brownfield sites that want to change direction , is able to use the pipeline infrastructure , loading facilities and other bits of the previous import terminal at sabine pass to export gas .
Wood group climbed 6.5 percent to 520 pence after the u.k. oil and gas services company agreed to buy psn for a total enterprise value of $ 955 million to create the world 's leading brownfield production services provider .