Not Anthropogenic Frontline
Warming Is Not Anthropogenic – Multiple Natural Processes Subsume Human Impacts
Bast and Taylor 11 – *CEO of the Heartland Institute, author of Rebuilding America’s Schools (1990), Why We Spend Too Much on Health Care (1992) Eco-Sanity: A Common-Sense Guide to Environmentalism (1994) Education & Capitalism (2003), Climate Change Reconsidered (2009), and The Patriot’s Toolbox (2010, rev. ed. 2011), ** managing editor of Environment & Climate News, Senior Fellow for The Heartland Institute, bachelors degree from Dartmouth College and law degree from the Syracuse University College of Law, (Joseph and James, “Global Warming: Not a Crisis,” The Heartland Institute, 8/2/11, http://heartland.org/ideas/global-warming-not-crisis) //PC
Natural or Man-Made? The Intergovernmental Panel on Climate Change (IPCC), an agency of the United Nations, claims the warming that has occurred since the mid-twentieth century “is very likely due to the observed increase in anthropogenic greenhouse gas concentrations” (IPCC, 2007). Many climate scientists disagree with the IPCC on this key issue. As Idso and Singer wrote in 2009, The IPCC does not apply generally accepted methodologies to determine what fraction of current warming is natural, or how much is caused by the rise in greenhouse gases (GHG). A comparison of “fingerprints” from best available observations with the results of state-of-the-art GHG models leads to the conclusion that the (human-caused) GHG contribution is minor. This fingerprint evidence, though available, was ignored by the IPCC. The IPCC continues to undervalue the overwhelming evidence that, on decadal and century-long time scales, the Sun and associated atmospheric cloud effects are responsible for much of past climate change. It is therefore highly likely that the Sun is also a major cause of twentieth-century warming, with anthropogenic GHG making only a minor contribution. In addition, the IPCC...