It is not clear exactly how high or how expensive the Nakheel Tower will be but it will have .more than 200 floors. and be part of .a multi-billion pound development.. Speaking at a press conference yesterday, a cautious Nakheel chief executive officer, Christopher O.Donnell, said: .From our perspective, we are building a tower that.s going to be over 1km in height. The Nakheel Tower will have around 150 lifts and be built with some 500,000m3 of concrete. The building will have enough cooling capacity to air-condition more than 14,000 modern homes. The temperature in the atmosphere at the top of the building could be as much as ten degrees cooler than the bottom. Planned high speed shuttle lifts will allow people to see the sunset twice . from the bottom and again from the top of the building.