By Roger Harrabin
BBC News environment analyst
La Nina caused some of the coldest temperatures in memory in China
Global temperatures will drop slightly this year as a result of the cooling effect of the La Nina current in the Pacific, UN meteorologists have said.
The World Meteorological Organization's secretary-general, Michel Jarraud, told the BBC it was likely that La Nina would continue into the summer.
This would mean global temperatures have not risen since 1998, prompting some to question climate change theory.
the rest here: http://news.bbc.co.uk/2/hi/science/nature/7329799.stm