As part of Lecture One of his 2012 Christmas Lectures, 'The Modern Alchemist', Dr Peter Wothers visits a research lab near Cambridge where they are investigating new fire prevention technologies. Normal air contains 21% Oxygen. Will Peter be able to light a fire in an environment where the air only has only 15% Oxygen? The Ri is on Twitter: http://twitter.com/ri_science and Facebook: http://www.facebook.com/royalinstitution and Tumblr: http://ri-science.tumblr.com/ Our editorial policy: http://www.rigb.org/home/editorial-policy Subscribe for the latest science videos: http://bit.ly/RiNewsletter © The Royal Institution 2013.