First Time in 800,000 Years: April’s CO2 Levels Above 400 ppm
CBS News, May 6, 2014
CBS News, May 6, 2014
New York Times, May 6, 2014
Reuters, May 6, 2014
U-T San Diego, May 2, 2014
NBC Today, April 30, 2014
ABC News, April 30, 2014
U-T San Diego, April 29, 2014
NBC San Diego, April 28, 2014
NBC, April 28, 2014
New York Times, April 28, 2014