On May 8, 2013, the Wall Street Journal trotted out former astronaut Harrison Schmitt and physics professor William Happer to proclaim that 400 ppm of CO2 is no big deal. In fact, they exclaim that this extra CO2 is good for us because it is good for plants. Media Matters harpooned the WSJ article, citing scientific research indicating:

• That the increased CO2 puts 20-30% of plant and animal species at increased risk.
• That climate change is leading to more floods and droughts, hurting agriculture and severe crop reduction.
• That climate change is "driving a multitude of related and interacting changes in the Earth system, including decreases in the amounts of ice stored in mountain glaciers and polar regions, increases in sea level, changes in ocean chemistry, and changes in the frequency and intensity of heat waves, precipitation events, and droughts."
• That the WSJ article is wrong to claim that current CO2 levels are historically low, because they've only been higher during periods of mass extinction. For the past 800,000 years prior to the industrial revolution, the rate of CO2 never exceeded 300 ppm. Further, the problem is not simply the rate, but the rate of increase of the rate.
• That most species alive today have "never existed in a world with CO2 levels substantially higher than today's".
• That the WSJ article is factually incorrect to claim that carbon dioxide levels have "little correlation" with temperatures.

Media Matters also points out that neither of the two authors of the WSJ article has ever written a peer-reviewed article on climate change. Happer is the Chairman of the Board of Directors of the George C. Marshall Institute, which accepts funding from the Exxon Education Foundation and the Koch brothers. Schmitt was a director at the industry-funded Heartland Institute. Schmitt has been a member of the Heartland Institute's board of directors, which received more than $600,000 from ExxonMobil between 1998 and 2006 and still receives funding from the Charles Koch Foundation. Media Matters also points out that the WSJ has made a habit of publishing misleading and outright false information regarding climate change (see citations). In fact the Union of Concerned Scientists concluded that 81% of the information regarding climate change published by the WSJ during 2011-2012 is misleading.