Radio 4 in Four - Is it better to build our cities up or down? - ÃÛÑ¿´«Ã½ Sounds

Radio 4 in Four - Is it better to build our cities up or down? - ÃÛÑ¿´«Ã½ Sounds
Is it better to build our cities up or down?
Structural engineer Roma Agrawal on towering skylines and ancient underground cities.