Despite the international scientific community’s consensus on climate change, a very small band of critics continues to deny that climate change exists or that humans are causing it. Widely known as climate change “skeptics” or "deniers", these individuals are generally not climate scientists and do not debate the science with the climate scientists directly – for example, by publishing in peer-reviewed scientific journals or participating in international conferences on climate science. Instead, they focus their attention on the media, the general public, and policy makers with the goal of delaying action on climate change.
Not surprisingly, the skeptics have received significant funding from coal and oil companies, including ExxonMobil. They also have well-documented connections with public relations firms that have set up industry-funded lobby groups to - in the words of one leaked memo - "reposition global warming as theory (not fact)."
Over the years, the skeptics have employed a wide range of arguments against taking action on climate change - some of which actually contradict each other. For example, they have claimed that:
Climate change is not occurring
- The global climate is actually getting colder
- The global climate is getting warmer, but not because of human activities
- The global climate is getting warmer, in part because of human activities, but this will create greater benefits than costs
- The global climate is getting warmer, in part because of human activities, but the impacts are not sufficient to require any policy response
To gain an understanding of the level of scientific consensus on climate change, a recent study examined every article on climate change published in peer-reviewed scientific journals over a 10-year period. Of the 928 articles on climate change the authors found, not one of them disagreed with the consensus position that climate change is happening or is human-induced.
These findings contrast dramatically with the popular media's reporting on climate change. One recent study analyzed coverage of climate change in four influential American newspapers (New York Times, Washington Post, LA Times, and Wall Street Journal) over a 14-year period. It found that more than half of the articles discussing climate change gave equal weight to the scientifically discredited views of the skeptics.
This discrepancy is largely due to the media’s drive for balance in reporting. Journalists are trained to identify one position on any issue, and then seek out a conflicting position, providing both sides with roughly equal attention. Unfortunately, the “balance” of the different views within the media does not always correspond with the actual prevalence of each view within society, and can result in unintended bias. This has been the case with reporting on climate change, and as a result, many people believe that climate change is still being debated by scientists when in fact it is not.
While some level of debate is of course useful when looking at major social problems, eventually society needs to move on and actually address the issue. To do nothing about the problem of climate change is akin to letting a fire burn down a building because the precise temperature of the flames is unknown, or to not address the problem of smoking because one or two doctors still claim that it does not cause lung cancer. As the United Nations Framework Convention on Climate Change (UNFCCC) acknowledges, a lack of full scientific certainty about some aspects of climate change is not a reason for delaying an immediate response that will, at a reasonable cost, prevent dangerous consequences in the climate system.
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