Assuming a local authority appreciates the chance to demonstrate a commitment to sustainability by fostering environmentally sound development and many under agenda 21 are supposed to be doing just that - the guide details what a standard scheme would have to offer , instead of sustainability to bring its residual land value into line with that afforded by a green scheme 如果地方政府愿意通過(guò)扶持環(huán)保開發(fā)的形式向公眾展示在可持續(xù)方面所履行的義務(wù),并且在21世紀(jì)議程指導(dǎo)下推測(cè)許多政府正打算這么做,那么這本指南詳盡的說(shuō)明了普通的住宅方案所需地內(nèi)容來(lái)取代可持續(xù)性,以便獲取與綠色方案所帶來(lái)的相同剩余土地價(jià)值。