Oklahoman: Although temperatures were cooler in Oklahoma, 2014 was the warmest year on record worldwide, climate scientists announced Friday. The record is the latest in a series of years with record warmth, scientists from NASA and the National Oceanic and Atmospheric Administration reported. The previous record was set in 2005 and tied in 2010. Climate scientists said Friday the overall warming trend is being driven by greenhouse gases, and is likely to continue. The announcement is based on separate,...