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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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The Consensus Project

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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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Skeptical Science iPhone Reports

Here are global warming skeptic arguments ranked by how often they've been reported from the Skeptical Science iPhone app. You can download the iPhone app for free from http://itunes.com/apps/skepticalscience.

Total # of reports submitted: 16441

1	Models are unreliable	15.1%
2	Temp record is unreliable	7.4%
3	Hockey stick is broken	4.8%
4	Climate's changed before	4.4%
5	It's the sun	3.0%
6	There's no empirical evidence	2.8%
7	There is no consensus	2.2%
8	It's cooling	2.2%
9	1934 - hottest year on record	2.1%
10	CO2 limits will harm the economy	2.1%
11	It hasn't warmed since 1998	1.9%
12	It's freaking cold!	1.9%
13	Antarctica is gaining ice	1.6%
14	Medieval Warm Period was warmer	1.5%
15	Renewables can't provide baseload power	1.4%
16	We're heading into an ice age	1.4%
17	Increasing CO2 has little to no effect	1.3%
18	Polar bear numbers are increasing	1.3%
19	Tree-rings diverge from temperature after 1960	1.2%
20	It's not bad	1.2%
21	It's a 1500 year cycle	1.1%
22	Ice age predicted in the 70s	1.1%
23	CO2 is not a pollutant	1.0%
24	Al Gore got it wrong	1.0%
25	It's Urban Heat Island effect	1.0%
26	Animals and plants can adapt	1.0%
27	Climategate CRU emails suggest conspiracy	1.0%
28	CO2 lags temperature	0.9%
29	Was Greenland really green in the past?	0.8%
30	Global warming stopped in ~~1998~~, ~~1995~~, ~~2002~~, ~~2007~~, ~~2010~~, ????	0.8%
31	Volcanoes emit more CO2 than humans	0.8%
32	Climate sensitivity is low	0.8%
33	Phil Jones says no global warming since 1995	0.7%
34	Oceans are cooling	0.7%
35	Ice isn't melting	0.7%
36	Sea level rise predictions are exaggerated	0.7%
37	We're coming out of the Little Ice Age	0.7%
38	It's a natural cycle	0.6%
39	CO2 was higher in the past	0.6%
40	2009-2010 winter saw record cold spells	0.6%
41	IPCC is alarmist	0.6%
42	Human CO2 is a tiny % of CO2 emissions	0.6%
43	It's microsite influences	0.5%
44	Dropped stations introduce warming bias	0.5%
45	The science isn't settled	0.5%
46	IPCC were wrong about Himalayan glaciers	0.5%
47	Greenland ice sheet won't collapse	0.4%
48	Water vapor is the most powerful greenhouse gas	0.4%
49	Glaciers are growing	0.4%
50	Record snowfall disproves global warming	0.4%
51	Arctic icemelt is a natural cycle	0.4%
52	Sea level rise is exaggerated	0.4%
53	Less than half of published scientists endorse global warming	0.4%
54	Humans are too insignificant to affect global climate	0.4%
55	Scientists can't even predict weather	0.4%
56	It's only a few degrees	0.4%
57	CO2 effect is saturated	0.4%
58	Over 31,000 scientists signed the OISM Petition Project	0.3%
59	Greenland is gaining ice	0.3%
60	Solar cycles cause global warming	0.3%
61	CO2 has a short residence time	0.3%
62	Earth hasn't warmed as much as expected	0.3%
63	There's no correlation between CO2 and temperature	0.3%
64	Scientists tried to 'hide the decline' in global temperature	0.3%
65	Hansen's 1988 prediction was wrong	0.3%
66	Other planets are warming	0.3%
67	CO2 only causes 35% of global warming	0.3%
68	Arctic sea ice has recovered	0.3%
69	They changed the name from 'global warming' to 'climate change'	0.3%
70	Mars is warming	0.3%
71	Ocean acidification isn't serious	0.3%
72	500 scientists refute the consensus	0.3%
73	It cooled mid-century	0.3%
74	It's cosmic rays	0.3%
75	CO2 is plant food	0.3%
76	Melting ice isn't warming the Arctic	0.2%
77	Trenberth can't account for the lack of warming	0.2%
78	CO2 is not the only driver of climate	0.2%
79	Warming causes CO2 rise	0.2%
80	Satellite error inflated Great Lakes temperatures	0.2%
81	Peer review process was corrupted	0.2%
82	Murry Salby finds CO2 rise is natural	0.2%
83	The IPCC consensus is phoney	0.2%
84	Greenhouse effect has been falsified	0.2%
85	It's El Niño	0.2%
86	Climate is chaotic and cannot be predicted	0.2%
87	We're heading into cooling	0.2%
88	CRU tampered with temperature data	0.2%
89	The sun is getting hotter	0.2%
90	Mt. Kilimanjaro's ice loss is due to land use	0.2%
91	Naomi Oreskes' study on consensus was flawed	0.2%
92	IPCC overestimate temperature rise	0.2%
93	It's methane	0.2%
94	2nd law of thermodynamics contradicts greenhouse theory	0.2%
95	Lindzen and Choi find low climate sensitivity	0.2%
96	CO2 measurements are suspect	0.2%
97	Solar Cycle Length proves its the sun	0.2%
98	Humidity is falling	0.2%
99	Neptune is warming	0.2%
100	It's a climate regime shift	0.1%
101	Jupiter is warming	0.1%
102	It warmed before 1940 when CO2 was low	0.1%
103	It's albedo	0.1%
104	Extreme weather isn't caused by global warming	0.1%
105	CO2 was higher in the late Ordovician	0.1%
106	DMI show cooling Arctic	0.1%
107	Scientists retracted claim that sea levels are rising	0.1%
108	It's CFCs	0.1%
109	Springs aren't advancing	0.1%
110	IPCC were wrong about Amazon rainforests	0.1%
111	Hurricanes aren't linked to global warming	0.1%
112	Antarctica is too cold to lose ice	0.1%
113	Roy Spencer finds negative feedback	0.1%
114	Southern sea ice is increasing	0.1%
115	Greenland has only lost a tiny fraction of its ice mass	0.1%
116	Positive feedback means runaway warming	0.1%
117	We didn't have global warming during the Industrial Revolution	0.1%
118	Skeptics were kept out of the IPCC?	0.1%
119	Postma disproved the greenhouse effect	0.1%
120	Record high snow cover was set in winter 2008/2009	0.1%
121	It warmed just as fast in 1860-1880 and 1910-1940	0.1%
122	Royal Society embraces skepticism	0.1%
123	CO2 is coming from the ocean	0.1%
124	Tuvalu sea level isn't rising	0.1%
125	Pluto is warming	0.1%
126	A drop in volcanic activity caused warming	0.1%
127	It's aerosols	0.1%
128	Breathing contributes to CO2 buildup	0.1%
129	Ice Sheet losses are overestimated	0.1%
130	Most of the last 10,000 years were warmer	0.1%
131	Freedom of Information (FOI) requests were ignored	0.1%
132	There's no tropospheric hot spot	0.1%
133	It's Pacific Decadal Oscillation	0.1%
134	Water levels correlate with sunspots	0.1%
135	97% consensus on human-caused global warming has been disproven	0.1%
136	Satellites show no warming in the troposphere	0.1%
137	It's the ocean	0.1%
138	Soares finds lack of correlation between CO2 and temperature	0.1%
139	CO2 is not increasing	0.1%
140	Clouds provide negative feedback	0.1%
141	It's ozone	0.1%
142	It's land use	0.1%
143	Arctic sea ice extent was lower in the past	0.1%
144	Mauna Loa is a volcano	0.1%
145	It's waste heat	0.1%
146	Corals are resilient to bleaching	0.1%
147	Arctic sea ice loss is matched by Antarctic sea ice gain	0.0%
148	CERN CLOUD experiment proved cosmic rays are causing global warming	0.0%
149	Sea level fell in 2010	0.0%
150	It's satellite microwave transmissions	0.0%
151	Water vapor in the stratosphere stopped global warming	0.0%
152	An exponential increase in CO2 will result in a linear increase in temperature	0.0%
153	Sea level is not rising	0.0%
154	Loehle and Scafetta find a 60 year cycle causing global warming	0.0%
155	No warming in 16 years	0.0%
156	Ljungqvist broke the hockey stick	0.0%
157	Renewable energy investment kills jobs	0.0%
158	Climate scientists are in it for the money	0.0%
159	CO2 is just a trace gas	0.0%
160	No long tail means climate sensitivity is low	0.0%
161	CO2 emissions do not correlate with CO2 concentration	0.0%
162	It's not urgent	0.0%
163	IPCC graph showing accelerating trends is misleading	0.0%
164	It's global brightening	0.0%
165	Heatwaves have happened before	0.0%
166	Arctic was warmer in 1940	0.0%
167	Humans survived past climate changes	0.0%
168	Removing all CO2 would make little difference	0.0%
169	The 97% consensus on human-caused global warming is a robust result	0.0%
170	A grand solar minimum could trigger another ice age	0.0%
171	CO2 limits will hurt the poor	0.0%
172	Renewable energy is too expensive	0.0%
173	CO2 increase is natural, not human-caused	0.0%
174	It's a climate shift step function caused by natural cycles	0.0%
175	Arctic Storm Caused the 2012 Record Sea Ice Minimum	0.0%
176	Climate 'Skeptics' are like Galileo	0.0%
177	CO2 limits will make little difference	0.0%
178	IPCC human-caused global warming attribution confidence is unfounded	0.0%
179	Venus doesn't have a runaway greenhouse effect	0.0%
180	Animal agriculture and eating meat are the biggest causes of global warming	0.0%
181	IPCC ‘disappeared’ the Medieval Warm Period	0.0%
182	It's clouds	0.0%
183	Climate change solutions are too expensive	0.0%

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