December 31, 2009 2:00 am

Heatwaves, a guerrilla trade war and victory for Brazil: welcome to 2010

By Alan Beattie, James Blitz, Chris Brown-Humes, Chris Cook, Clive Cookson, Clive Crook, Ed Crooks, John Gapper, David Gardner, Chris Giles, Fiona Harvey, Simon Kuper, Edward Luce, Quentin Peel, Gideon Rachman, Philip Stephens, Stefan Wagstyl, Jonathan Wheatley and Martin Wolf