NASA (via CNN) says that 2005 could be warmest year on record.

A weak El Nino and human-made greenhouse gases could make 2005 the warmest year since records started being kept in the late 1800s, NASA scientists said this week.

The warmest year on record was 1998, with 2002 and 2003 coming in second and third, respectively.

Last year was the the fourth-warmest recorded, with a global mean temperature of 57 degrees Fahrenheit (14 Celsius), which was about 1.5 degrees warmer than the middle of the century, NASA scientist Drew Shindell said in an interview.