Who knows what goes through the minds of property tycoons as they commission buildings with ever improved environmental features? Is it all about branding a building, or a genuine commitment to green issues? Either way, there is no doubt that, in the developed world, architects and developers are paying more attention to sustainability...The trend has also touched industrial property, where some companies are building solar panels on warehouses, or using the roofs to collect rainwater, or erecting wind turbines on site. Gazeley, owned by Wal-Mart, has plans for warehouses with grass roofs. [also refers to CB Richard Ellis, King Sturge, Stanhope, Co-op Insurance Services (part of Co-operative Group)]