California Governor Jerry Brown used the occasion of his fourth inaugural address to propose an ambitious new clean energy target for the state: 50% renewable energy by 2030.
“We are at a crossroads,” Brown said in announcing the proposal, according to Climate Progress. “The challenge is to build for the future, not steal from it, to live within our means and to keep California ever golden and creative.”
Already the leader in installed solar...
- Ph.D., Physics, University of North Texas. 
Nicola Scafetta is a research scientist at Duke University Physics Department. He is known for proposing a phenomenological theory of climate change, claiming that oscillations induced by solar changes and other astronomical influences can affect climate.
According to his theory, which he presented to the EPA in a presentation titled “Climate Change and its Causes, a Discussion about some Key Issues,” we would be facing an imminent cooling period. 
Stance on Climate Change
“At least 60% of the warming of the Earth observed since 1970 appears to be induced by natural cycles which are present in the solar system.” 
“If climate is as sensitive to solar changes as the above phenomenological findings suggest, the current anthropogenic contribution to global warming is significantly overestimated.” 
February 26, 2009
When the U.S. Environmental Protection Agency called for alternative views on climate change, three skeptics presented: Richard Lindzen, Jean Lind and Nicola Scafetta.
In his presentation, Scafetta suggests that “a significant portion of climate change is natural and linked to changes of solar activity.”and also discusses “the possibility of an imminent global cooling.” 
His findings have circulated through the skeptical science community, and on skeptical blogs such as WUWT (Watts Up With That).
Scafetta was the co-author of “Phenomenological solar signature in 400 years of reconstructed Northern Hemisphere temperature,” a paper widely quoted by climate skeptics.
- Science and Public Policy Institute (SPPI) — Scafetta published his paper, “Climate Change and Its Causes” (PDF) with SPPI.
May of Scafetta's skeptical opinion articles and publications were published by organizations known for doubting the existence of climate change (including the Heartland Institute, and the Science and Public Policy Institute).
Sample publications include:
- “Why the Anthropogenic Theory Proposed by the IPCC Should Be Questioned.” Watts Up With That. March 14, 2010.
- “Phenomenological solar signature in 400 years of reconstructed Northern Hemisphere temperature record.” Geophysical Research Letters, Vol. 33, L17718, 5 PP. Dec 2006.
- “Climate Change Reconsidered: The Report of the Nongovernmental International Panel on Climate Change (NIPCC)” (Contributing author). 2009. Editors S. Fred Singer and Craig Idso. Chicago, IL: The Heartland Institute.
- “Is climate sensitive to solar variability?” (PDF) Physics Today (*Published in the “Opinion” section). March 2008. Nicola Scafetta and Bruce J. West.
- “Climate Change and Its Causes” (PDF). Science and Public Policy Institute original paper. March 18, 2010.
- Disrupted Networks: from physics to climate change. Bruce J. West and Nicola Scafetta, World Scientific Publishing Company (2010).
“Nicola Scafetta, PhD” (PDF), Duke University. Accessed February, 2012.
“Climate Science Seminar: Climate Change and Its Causes: A Discussion about Some Key Issues,” National Center for Environmental Economics. Presented February 26, 2009.
Lisa Zygo. “Scientists find errors in hypothesis linking solar flares to global temperature,” Physorg.com, April 7, 2010. Archived February 10, 2012, with WebCite.
Nicola Scafetta and Bruce J. West. “Is climate sensitive to solar variability?” (PDF), Physics Today (Opinion), March 2008.
“Nicola Scafetta,” International Conference on Climate Change (climateconference.heartland.org). Accessed February 10, 2012.
“A phenomenological sequel,” RealClimate, November 27, 2007.
Michael Le Page. “Sceptical climate researcher won't divulge key program,” New Scientist, December 18, 2009. Archived February 10, 2012, with WebCite.