THE BROAD VIEWCities in the region must embrace climate-responsive urban design that keeps the heat outIn a tropical city, however, a route is not truly walkable unless it is shaded, ventilated, connected and useful. PHOTO: BT FILEWHEN temperatures rise, our instinct is to turn up the air-conditioning. Energy consumption for space cooling is on track to more than double by 2050 at the current trend, and demand will rise as cities expand, living standards improve and heat intensifies. Air-conditioning will remain essential, but efficiency improvements cannot be the whole answer. A more durable strategy is to reduce the amount of cooling a building or district needs in the first place.