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All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.

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	Climate's changed before
	It's the sun
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Climate Misinformation by Source: David Archibald

Arguments

Favourite climate myths by David Archibald

Below are many of the climate myths used by David Archibald plus how often each myth has been used.

Climate myths by Archibald	What the Science Says	Usage
"Medieval Warm Period was warmer"	Globally averaged temperature now is higher than global temperature in medieval times.	1
"It's cosmic rays"	Cosmic rays show no trend over the last 30 years & have had little impact on recent global warming.	1
"It's the sun"	In the last 35 years of global warming, sun and climate have been going in opposite directions	1
"CO2 limits will harm the economy"	The benefits of a price on carbon outweigh the costs several times over.	1
"Solar Cycle Length proves its the sun"	The sun has not warmed since 1970 and so cannot be driving global warming.	1
"CO2 was higher in the past"	Climate has changed along with CO2 levels through geological time.	1
"Oceans are cooling"	The most recent ocean measurements show consistent warming.	1
"Climate sensitivity is low"	Net positive feedback is confirmed by many different lines of evidence.	1
"CO2 is plant food"	The effects of enhanced CO2 on terrestrial plants are variable and complex and dependent on numerous factors	1
"Sea level rise predictions are exaggerated"	Sea level rise is now increasing faster than predicted due to unexpectedly rapid ice melting.	1
"Lindzen and Choi find low climate sensitivity"	Lindzen and Choi’s paper is viewed as unacceptably flawed by other climate scientists.	1
"It's a natural cycle"	No known natural forcing fits the fingerprints of observed warming except anthropogenic greenhouse gases.	1
"Arctic sea ice has recovered"	Thick arctic sea ice is in rapid retreat.	1
"IPCC ‘disappeared’ the Medieval Warm Period"	The IPCC simply updated their temperature history graphs to show the best data available at the time.	1
"Arctic sea ice loss is matched by Antarctic sea ice gain"	Arctic sea ice loss is three times greater than Antarctic sea ice gain.	1
"Record high snow cover was set in winter 2008/2009"	Winter snow cover in 2008/2009 was average while the long-term trend in spring, summer, and annual snow cover is rapid decline.	1
"We're heading into an ice age"	Worry about global warming impacts in the next 100 years, not an ice age in over 10,000 years.	1

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