THE theory of man-made global warming has become such a powerful political force that other explanations for climate change have been largely ignored, according to a Channel 4 documentary shown last night, which argued that changes in the Earth’s climate may be better explained by the sun’s radiation.

Cork driver, Michael Keohane, made a dramatic return to the British Formula 3 championship at Thruxton today to claim second place behind race winner, Heikki Kovalainen.