According to Britain, year 2010 can be the warmest year. Year 1998 was the warmest year till now but according to Britain, year 2010 may be the warmest year considering global warming effect.
Global warming is increasing the temperature of the earth and the temperature can be increased 0.6 degree at 2010year.
El Nino Effect
El Nino is responsible for temperature increment. Because of El Nino effect, Pacific Ocean is getting higher temperature. Scientists are telling that it is sure that 2010 will be the warmest year till 1860.
It is also depending upon few conditions. If any Volcano explodes then temperature will not get so much effect. One more concept has come for 2010, that 2010 can be most rained year. Considering huge humidity and higher temperature, 2010 can be the rained year.