title: Breakthrough of the year. Global warming, hotter than ever.
abstract: Climate change, a perennial runner-up for Breakthrough of the Year, broke from the pack this year--both in the pages of this section and in the public arena.
authors: Eli
authors: E
authors: Kintisch
authors: Richard A
authors: RA
authors: Kerr
mesh_terms: D017752:Greenhouse Effect; D011057:Politics; D014480:United Nations; D014481:United States