An Australian researcher is using bacteria to develop a biological cement that may help patch up failing Dutch dykes, essential in protecting the land from rising sea levels.
Vicky Whiffin of Murdoch University has been experimenting with bacteria which convert sand into sandstone, as part of her PhD research.
Can the great technological feats of the early Romans still inform urban planning today? Professor Christer Bruun of classics says they can in the area of water conservation.