Boris Johnson

Prime Minister Cameron says he wants to be the greenest government ever, but the definition of green is immature... I don't deny for a moment that CO2 is a greenhouse gas, but there are so many other factors that affect climate. It is more complicated than the computer models that we are using. What the truth is, nobody knows.

I've been a big believer in musicians turned actor, going back to Sinatra winning the Oscar for 'From Here To Eternity.' David Bowie in 'Man Who Fell to Earth,' Kris Kristofferson's been great in a bunch of films. Liza Minnelli, Barbra Streisand, Mariah Carey, I thought was great in 'Precious.'