WASHINGTON (Reuters) - The amount of climate-warming carbon dioxide in the atmosphere topped 400 parts per million at a key observing station in Hawaii for the first time since measurement began in 1958, the National Oceanic and Atmospheric Administration said on Friday. Full story
In his “Now We Know” segment, Chris Hayes notes that there was a particularly dramatic upward spike in carbon dioxide in just the last year.
Red Bull Formula One driver Sebastian Vettel of Germany sits in his car as he is cooled with dry ice during the third practice session of the Bahrain F1 Grand Prix at the Sakhir circuit, south of Manama April 20, 2013. REUTERS/Ahmed Jadallah (BAHRAIN - Tags: SPORT MOTORSPORT F1)