Alun Hill visited England's Oxford to report on a new "green" project - designed by a 22 year old.
He shows how a "reversed" Archimedes screw, powered by a tributary of London's River Thames, is generating electricity for the nearby apartments - and how a special "pipe" laid in the river produces hot water.
He then shows electricity supply meters - which run backwards!
There's also an interview with the young designer himself - 23 year old Henry Reily-Collins. http://www.Dandridges-Mill.co.uk
