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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
It's not bad
There is no consensus
It's cooling
Models are unreliable
Temp record is unreliable
Animals and plants can adapt
It hasn't warmed since 1998
Antarctica is gaining ice
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The Great Global Warming Swindle

Skeptic Arguments What the Science Says
"Ice age predicted in the 70s" The vast majority of climate papers in the 1970s predicted warming.
"It cooled mid-century" Mid-century cooling involved aerosols and is irrelevant for recent global warming.
"CO2 lags temperature" CO2 didn't initiate warming from past ice ages but it did amplify the warming.
"Models are unreliable" Models successfully reproduce temperatures since 1900 globally, by land, in the air and the ocean.
"Human CO2 is a tiny % of CO2 emissions" The natural cycle adds and removes CO2 to keep a balance; humans add extra CO2 without removing any.
"There is no consensus" 97% of climate experts agree humans are causing global warming.
"It's the sun"

In the last 35 years of global warming, sun and climate have been going in opposite directions

"Water vapor is the most powerful greenhouse gas"

Rising CO2 increases atmospheric water vapor, which makes global warming much worse.

"Climate's changed before" Climate reacts to whatever forces it to change at the time; humans are now the dominant forcing.
"CO2 limits will hurt the poor"

Those who contribute the least greenhouse gases will be most impacted by climate change.

"Solar Cycle Length proves its the sun" The sun has not warmed since 1970 and so cannot be driving global warming.
"It's not bad" Negative impacts of global warming on agriculture, health & environment far outweigh any positives.
"Greenland was green" Other parts of the earth got colder when Greenland got warmer.
"Satellites show no warming in the troposphere" The most recent satellite data show that the earth as a whole is warming.


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