Climate Change, "Happy Plants," And False Balance
Bloomberg News Gives Equal Weight To Climate Misinformer And Scientists
Carbon dioxide levels in the atmosphere passed  400 parts per million (ppm) on Thursday for the first time in human history. But one thing hasn't changed: false balance still crops up in climate change stories.
False balance  occurs when journalists give equal weight to arguments from both sides, regardless of where the facts lie. Climate change is a textbook example  of this problem -- in fact, the term was coined  in academic papers to criticize climate coverage in the 1990s.
Yet 20 years later, we still get articles like this  from Bloomberg News, reporting on the 400 ppm milestone:
"The Earth has had many-times-higher levels of CO2 in the past," said Marc Morano, former spokesman for Republican Senator James Inhofe  and executive editor of Climate Depot , a blog that posts articles skeptical of climate change. "Americans should welcome the 400 parts-per-million threshold. This means that plants are going to be happy, and this means that global-warming fearmongers are going to be proven wrong."
That position is disputed by many researchers, said Melanie Fitzpatrick, climate scientist at the Union of Concerned Scientists.
"This needs to be a wake-up call," she said in a statement. "Reaching 400 parts per million represents a dire experiment with the climate system. As long as humans have walked the Earth, we've never seen carbon dioxide levels this high."
Marc Morano  is not a scientist and has no scientific education. He is paid  by an oil-industry funded organization to confuse the public about climate change, and has compared  climate science to the Mayan calendar, Nostradamus, and medieval witchcraft. Moreover, his argument is laughable : by focusing on how carbon dioxide stimulates plant growth in a controlled environment, he ignores  that our huge emissions of it and other greenhouse gases are warming up the planet, thereby increasing the risk of extreme rainfall and drought to the detriment of agriculture. A Wall Street Journal  op-ed made the same argument on Thursday, leading to a deluge  of condemnation.
Bloomberg News didn't stop there, trotting out another thoroughly discredited  "skeptic" argument:
Skeptics of man's influence on warming temperatures note that while CO2 levels in the atmosphere have continued to rise since the 1990s, no year has been statistically warmer on average than 1998, with higher levels for 2005 and 2010 falling within the margin of error for that year, according to data compiled by the U.K. Met Office.
Even if the UK Met Office's ranking of 2010 and 2005 as the warmest years  on record globally is within the margin of error for 1998 (U.S.'s NASA and NOAA both rank  2010 and 2005 as statistically warmer  than 1998), the fact that the difference between these individual years is small illustrates again that we should pay more attention to the long-term trend. As NASA explained , "all three [surface temperature datasets] show the last decade is the warmest in the instrumental record."