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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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Skeptic Arguments and What the Science Says

The following numbering of skeptic arguments was fixed on 26 July 2010. For up-to-date numbering, see the current argument list.

1 "It's the sun" sun
2 "Climate's changed before" past
3 "There is no consensus" consensus
4 "It's cooling" cooling
5 "Models are unreliable" model
6 "Temp record is unreliable" temp
7 "It hasn't warmed since 1998" 1998
8 "Ice age predicted in the 70s" 1970s
9 "We're heading into an ice age" iceage
10 "Antarctica is gaining ice" antarctica
11 "CO2 lags temperature" lag
12 "It's not bad" impacts
13 "Al Gore got it wrong" gore
14 "It's cosmic rays" cosmic
15 "It's freaking cold!" cold
16 "Hurricanes aren't linked to global warming" hurricane
17 "1934 - hottest year on record" 1934
18 "Hockey stick is broken" hockey
19 "Mars is warming" mars
20 "It's Urban Heat Island effect" uhi
21 "It's a 1500 year cycle" 1500cycle
22 "Arctic icemelt is a natural cycle" arcticcycle
23 "Sea level rise is exaggerated" sealevel
24 "Water vapor is the most powerful greenhouse gas" vapor
25 "Other planets are warming" planets
26 "Greenland was green" green
27 "Oceans are cooling" oceanheat
28 "Climategate CRU emails suggest conspiracy" climategate
29 "Human CO2 is a tiny % of CO2 emissions" co2
30 "Climate sensitivity is low" sensitivity
31 "Increasing CO2 has little to no effect" greenhouse
32 "We're coming out of the Little Ice Age" lia
33 "It cooled mid-century" midcentury
34 "Glaciers are growing" glacier
35 "It warmed before 1940 when CO2 was low" pre1940
36 "There's no empirical evidence" evidence
37 "Polar bear numbers are increasing" bear
38 "Satellites show no warming in the troposphere" troposphere
39 "Mt. Kilimanjaro's ice loss is due to land use" kilimanjaro
40 "IPCC is alarmist" underestimat
41 "Extreme weather isn't caused by global warming" extreme
42 "CO2 is not a pollutant" pollutant
43 "There's no correlation between CO2 and temperature" correlate
44 "Greenland is gaining ice" greenland
45 "CO2 was higher in the past" pastco2
46 "Scientists can't even predict weather" weather
47 "There's no tropospheric hot spot" hotspot
48 "Neptune is warming" neptune
49 "Jupiter is warming" jupiter
50 "It's Pacific Decadal Oscillation" pdo
51 "CO2 effect is saturated" saturate
52 "Pluto is warming" pluto
53 "Greenland ice sheet won't collapse" icecollapse
54 "Volcanoes emit more CO2 than humans" volcano
55 "Animals and plants can adapt" species
56 "Medieval Warm Period was warmer" mwp
57 "CO2 measurements are suspect" co2data
58 "It's the ocean" ocean
59 "It's El Niño" elnino
60 "Arctic sea ice has recovered" arctic
61 "Less than half of published scientists endorse global warming" schulte
62 "Dropped stations introduce warming bias" dropped
63 "Solar Cycle Length proves its the sun" scl
64 "It's aerosols" aerosols
65 "It's microsite influences" microsite
66 "CO2 has a short residence time" residence
67 "It's a climate regime shift" shift
68 "2nd law of thermodynamics contradicts greenhouse theory" thermo
69 "Humans are too insignificant to affect global climate" significant
70 "It's not happening" warming
71 "Greenhouse effect has been falsified" falsify
72 "It's land use" landuse
73 "The science isn't settled" settled
74 "2009-2010 winter saw record cold spells" winter
75 "It's methane" methane
76 "500 scientists refute the consensus" 500
77 "Scientists tried to 'hide the decline' in global temperature" decline
78 "IPCC were wrong about Himalayan glaciers" himalaya
79 "Ocean acidification isn't serious" acid
80 "Sea level rise predictions are exaggerated" seapredict
81 "Naomi Oreskes' study on consensus was flawed" oreskes
82 "Phil Jones says no global warming since 1995" 1995
83 "Ice isn't melting" icemelt
84 "CO2 is coming from the ocean" oceanco2
85 "It's not us" agw
86 "CO2 is not increasing" co2up
87 "It's albedo" albedo
88 "Record snowfall disproves global warming" snowfall
89 "Hansen's 1988 prediction was wrong" hansen1988
90 "Lindzen and Choi find low climate sensitivity" lindzenchoi
91 "The sun is getting hotter" acrim
92 "Solar cycles cause global warming" solarcycle
93 "Springs aren't advancing" spring
94 "Over 31,000 scientists signed the OISM Petition Project" oism
95 "Water levels correlate with sunspots" watersun
96 "IPCC were wrong about Amazon rainforests" amazon
97 "Climate is chaotic and cannot be predicted" chaos
98 "Water vapor in the stratosphere stopped global warming" stratosphere
99 "Scientists retracted claim that sea levels are rising" searetract
100 "Mauna Loa is a volcano" mauna
101 "CO2 is not the only driver of climate" driver
102 "Trenberth can't account for the lack of warming" trenberth
103 "CO2 was higher in the late Ordovician" ordovician
104 "Southern sea ice is increasing" southice
105 "Melting ice isn't warming the Arctic" amplify
106 "Global warming stopped in 1998, 1995, 2002, 2007, 2010, ????" stopped
107 "Tree-rings diverge from temperature after 1960" diverge
108 "The IPCC consensus is phoney" hulme
109 "It's CFCs" cfc
110 "A drop in volcanic activity caused warming" volcanodrop
111 "CO2 emissions do not correlate with CO2 concentration" co2conc
112 "It's global brightening" bright
113 "Warming causes CO2 rise" warmco2
114 "It's ozone" ozone
115 "It's satellite microwave transmissions" microwave
116 "We didn't have global warming during the Industrial Revolution" industrial
117 "Greenland has only lost a tiny fraction of its ice mass" icefraction
118 "Antarctica is too cold to lose ice" toocold
119 "It's waste heat" waste
120 "CO2 is plant food" plant
124 "Satellite error inflated Great Lakes temperatures" greatlake
125 "Positive feedback means runaway warming" runaway
127 "CO2 is just a trace gas" trace
128 "IPCC overestimate temperature rise" overestimate
129 "Breathing contributes to CO2 buildup" breath
130 "Ice Sheet losses are overestimated" iceloss
131 "Royal Society embraces skepticism" royalsoc
132 "DMI show cooling Arctic" dmi
133 "CO2 only causes 35% of global warming" 35percent
134 "Humidity is falling" humidity
136 "It's a natural cycle" cycle
137 "It's only a few degrees" fewdegrees
139 "It's too hard" toohard
140 "CO2 limits will harm the economy" economy
141 "Renewables can't provide baseload power" baseload
143 "Clouds provide negative feedback" cloud
144 "CRU tampered with temperature data" tamper
145 "Peer review process was corrupted" peerreview
146 "Skeptics were kept out of the IPCC?" ipccskeptic
147 "Freedom of Information (FOI) requests were ignored" foi
148 "Corals are resilient to bleaching" bleach
151 "We're heading into cooling" futurecool
153 "They changed the name from 'global warming' to 'climate change'" name
155 "Soares finds lack of correlation between CO2 and temperature" soares
157 "Arctic sea ice loss is matched by Antarctic sea ice gain" seaice
158 "An exponential increase in CO2 will result in a linear increase in temperature" linear
159 "Record high snow cover was set in winter 2008/2009" snowcover
160 "Coral atolls grow as sea levels rise" atoll
161 "Earth hasn't warmed as much as expected" inertia
162 "It warmed just as fast in 1860-1880 and 1910-1940" trends
164 "IPCC ‘disappeared’ the Medieval Warm Period" ipccmwp
168 "Ljungqvist broke the hockey stick" ljungqvist
169 "CO2 limits will make little difference" limits
170 "Hansen predicted the West Side Highway would be underwater" highway
171 "Removing all CO2 would make little difference" removeco2
172 "It's not urgent" urgent
174 "It's soot" soot
175 "CO2 limits will hurt the poor" poor
176 "Arctic was warmer in 1940" arctic1940
177 "Renewable energy is too expensive" expensive
178 "Sea level rise is decelerating" sealevelrise
179 "Venus doesn't have a runaway greenhouse effect" venus
180 "It's internal variability" variable
181 "CO2 limits won't cool the planet" limitscool
182 "Sea level is not rising" searise
183 "Renewable energy investment kills jobs" jobs
185 "Great Barrier Reef is in good shape" gbr
186 "Roy Spencer finds negative feedback" negspencer
188 "Murry Salby finds CO2 rise is natural" salby
189 "CO2 increase is natural, not human-caused" co2increase
190 "Postma disproved the greenhouse effect" postma
195 "Sea level fell in 2010" slr2010
198 "Climate 'Skeptics' are like Galileo" galileo
201 "Tuvalu sea level isn't rising" tuvalu
214 "Himalayan glaciers are not shrinking" himalayagrow
215 "Climate science peer review is pal review" pal
216 "Nuclear testing is causing global warming" nuclear
217 "Arctic sea ice loss in the 1940s was similar to today's" arctic1940
218 "Arctic sea ice extent was lower in the past" pastarctic
226 "97% consensus on human-caused global warming has been disproven" robust97
228 "IPCC human-caused global warming attribution confidence is unfounded" confidence
229 "IPCC global warming projections were wrong" projections
230 "IPCC admits global warming has paused" ipccpause
232 "Heatwaves have happened before" heatwave

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