There is a chill in the air at Cannons Gym a favourite lunchtime haunt for City of London workers To deal with this summers unusually high temperatures the fitness centre has gone overboard with the airconditioning So much so in fact that at quiet times the gym feels like somewhere in the Arctic This is just one example of how the modern world casually misuses airconditioning It has become a central feature of work and play a potent symbol of the ability of humanity to control the climate or at least modify it