Efforts to scientifically ascertain and attribute mechanisms responsible for recent global warming and related climate changes on Earth have found that the main driver is elevated levels of greenhouse gases produced by human activities, with natural forces adding variability. The likely range of human-induced surface-level air warming by 2010–2019 compared to levels in 1850–1900 is 0.8 °C to 1.3 °C, with a best estimate of 1.07 °C. This is close to the observed overall warming during that time of 0.9 °C to 1.2 °C, while temperature changes during that time were likely only ±0.1 °C due to natural forcings and ±0.2 °C due to variability in the climate.
The global warming controversy concerns the public debate over whether global warming is occurring, how much has occurred in modern times, what has caused it, what its effects will be, whether any action can or should be taken to curb it, and if so what that action should be. In the scientific literature, there is a strong consensus that global surface temperatures have increased in recent decades and that the trend is caused by human-induced emissions of greenhouse gases. No scientific body of national or international standing disagrees with this view, though a few organizations with members in extractive industries hold non-committal positions, and some have attempted to convince the public that climate change is not happening, or if the climate is changing it is not because of human influence, attempting to sow doubt in the scientific consensus.
Roger A. Pielke Jr. is an American political scientist and professor, and was the director of the Sports Governance Center within the Department of Athletics at the Center for Science and Technology Policy Research at the University of Colorado Boulder.
Christopher William "Chris" Landsea is an American meteorologist, formerly a research meteorologist with the Hurricane Research Division of the Atlantic Oceanographic and Meteorological Laboratory at NOAA, and now the Science and Operations Officer at the National Hurricane Center. He is a member of the American Geophysical Union and the American Meteorological Society.
The Great Global Warming Swindle is a 2007 British polemical documentary film directed by Martin Durkin. The film denies the scientific consensus about the reality and causes of climate change, justifying this by suggesting that climatology is influenced by funding and political factors. The program was formally criticised by Ofcom, the UK broadcasting regulatory agency, which ruled the film failed to uphold due impartiality and upheld complaints of misrepresentation made by David King, who appeared in the film.
Nir Joseph Shaviv is an Israeli‐American physics professor. He is professor at the Racah Institute of Physics of the Hebrew University of Jerusalem.
Climate change conspiracy theories assert that the scientific consensus on global warming is based on conspiracies to produce manipulated data or suppress dissent. It is one of a number of tactics used in climate change denial to attempt to manufacture political and public controversy disputing this consensus. Conspiracy theorists typically allege that, through worldwide acts of professional and criminal misconduct, the science behind global warming and climate change has been invented or distorted for ideological or financial reasons.
Climate change denial, or global warming denial, is denial, dismissal, or unwarranted doubt that contradicts the scientific consensus on climate change, including the extent to which it is caused by humans, its effects on nature and human society, or the potential of adaptation to global warming by human actions. Many who deny, dismiss, or hold unwarranted doubt about the scientific consensus on anthropogenic global warming self-label as "climate change skeptics", which several scientists have noted is an inaccurate description. Climate change denial can also be implicit when individuals or social groups accept the science but fail to come to terms with it or to translate their acceptance into action. Several social science studies have analyzed these positions as forms of denial or denialism, pseudoscience, or propaganda.
Tom Victor Segalstad is a Norwegian geologist. He has taught geology and geophysics at the University of Oslo, Norway, and at Pennsylvania State University, United States.
Vincent Richard Gray was a New Zealand chemist, and a founder of the New Zealand Climate Science Coalition.
This is a list of climate change topics.
Lawrence Solomon is a Canadian writer on the environment and the executive director of Energy Probe, a Canadian non-governmental environmental policy organization, and a member of the advisory board of the far-right Rebel News. His writing has appeared in a number of newspapers, including The National Post where he has a column, and he is the author of several books on energy resources, urban sprawl, and global warming, among them The Conserver Solution (1978), Energy Shock (1980), Toronto Sprawls: A History (2007), and The Deniers (2008).
DeSmog, founded in January 2006, is a blog that focuses on topics related to global warming. DeSmog opposes what it describes as "a well-funded and highly organized public relations campaign" that it says is "poisoning" the climate change debate. The site was co-founded by James Hoggan, president of a public relations firm based in Vancouver, British Columbia, Canada.
An Appeal to Reason: A Cool Look at Global Warming is a 2008 book by Nigel Lawson. In it, Lawson claims that, although global warming is happening, the science is far from settled. He opposes the scientific consensus as summarized by the IPCC. He also argues that warming will bring both benefits and negative consequences, and that the impact of these changes will be relatively moderate rather than apocalyptic. The book has been rejected by climatologists, including IPCC authors Jean Palutikof and Robert Watson as unscientific.
Heaven and Earth: Global Warming – The Missing Science is a popular science book published in 2009 and written by Australian geologist, professor of mining geology at Adelaide University, and mining company director Ian Plimer. It disputes the scientific consensus on climate change, including the view that global warming is "very likely due to the observed increase in anthropogenic (man-made) greenhouse gas concentrations" and asserts that the debate is being driven by what the author regards as irrational and unscientific elements.
Energy Probe is a non-governmental social, economic, and environmental policy organization based in Toronto, Canada known for denying man-made climate change.
The Real Global Warming Disaster is a 2009 book by English journalist and author Christopher Booker in which he asserts that global warming cannot be attributed to humans, and then alleges how the scientific opinion on climate change was formulated.
Watts Up With That? (WUWT) is a blog promoting climate change denial that was created by Anthony Watts in 2006.
Fritz Vahrenholt is a German politician (SPD), industrialist and a climate change denier.
Timothy Francis Ball was a British-born Canadian public speaker and writer who was a professor in the Department of Geography at the University of Winnipeg from 1971 until his retirement in 1996. Ball then became very active in promoting rejection of the scientific consensus on global warming, giving public talks and writing opinion pieces and letters to the editor for Canadian newspapers. He has been a member of energy industry funded lobbying groups.
