BBC: The world in 2008 has been cooler than at any time since the turn of the century, scientists say. Cooling La Nina conditions in the Pacific brought temperatures down to levels last seen in the year 2000. The World Meteorological Organization (WMO) notes that temperatures remained about 0.3C above the 1961-1990 average. Computer models suggest that natural cycles may cool the Earth’s surface in the next few years, masking the warming impact of rising greenhouse gas …