This summer is breaking temperature records like never before. The rising mercury is a reminder of the impact of climate change. Unless drastic action is taken, the temperatures seen in recent weeks will become increasingly common. Failing to find sustainable ways to heat and cool our offices and homes when temperatures soar – or plummet in winter – could lead to more Co2 being produced as more people turn to AC units or turn up their thermostats. But experts say there’s another way. Rethink our built environment.