Incredible But True Incredible But True Human World History Makers Cities Of The World Art And Music Sporting Headlines Plant Life Fish, Amphibians, Reptiles Birds and Mammals Creepy Crawlies Marine Life Restless Earth Earth's Secrets Changing Weather Seas And Oceans Comparisons Amazing Structures Machines And Man World Of Inventions Travelling Around Mysterious Universe	Water Facts Who says we use more water today? A modern city dweller uses about 230 litres a day, but an Ancient Roman citizen used about 1,350 litres.   Previous: Back Book: Incredible But True Section: Incredible But True Chapter: Human World