Steel

Steel is one of the few manmade materials that is 100% recyclable - not only could your household cutlery be made of an old Victorian bridge or an old battleship, but after 9-11, NYC authorities dispatched thousands of tons of the wreckage around the world for recycling. Steel shipping containers can also be turned into surprisingly spacious and appealing housing as Jonny discovers on a visit to London's Docklands. We also witness the super-strength of world record holder Manjit Singh who risks impalement to bend steel using his neck. Richard examines the trusty lawnmower invented by Englishman Edwin Budding and Jonny finds out about the amazing properties of Japanese Samurai swords before raising his grinder to some bathroom scales.