From snowstorms to floods and tornadoes, severe weather wreaked havoc across the United States this year, with 2011 marking far more extreme weather events than a typical year. In this video from PBS, Hari Sreenivasan discusses the science behind this year of extreme weather with NOAA's Kathryn Sullivan and Weather Underground's Jeff Masters (check out his top ten weather events of 2011 here).
So what do you think? Global warming or just natural extremes?
So what do you think? Global warming or just natural extremes?