Boris Johnson has urged business executives to invest in the UK's efforts to develop cleaner technology, telling them: "The market is going green".

Speaking at the Global Investment Summit in London, the prime minister said: "I can deploy billions - with the approval of the Chancellor, obviously - but you in this room, you can deploy trillions." Report by Buseld. Like us on Facebook at http://www.facebook.com/itn and follow us on Twitter at http://twitter.com/itn