From Envirowiki

This page contains a full list of climate denier arguments. These arguments pop up repeatedly, especially on the internet, even though all of them have been comprehensively rebutted, often multiple times, by different people.

• How to Talk to a Global Warming Sceptic on "A Few Things Ill Considered" has a list of about 55 commonly used arguments.

[edit] 1 From Gristmill blog

This is a full, categorised list with linked rebuttals, originally from http://gristmill.grist.org/skeptics

• There is no evidence
• Global warming is a hoax
• One record year is not global warming
• Climate change mitigation would lead to disaster
• Mars and Pluto are warming too
• Mauna Loa is a volcano
• One hundred years is not enough
• Glaciers have always grown and receded
• Why should the U.S. join Kyoto when China and India haven't?
• It's cold today in Wagga Wagga
• CO2 in the air comes mostly from volcanoes
• We can't even predict the weather next week
• We can not trust unproven computer models
• The satellites show cooling
• Natural emissions dwarf human emissions
• The models don't have clouds
• Global warming stopped in 1998
• It's the sun, stupid
• If we can't understand the past, how can we understand the present?
• The scientists aren't even sure
• Vinland was full of grapes
• Some sites show cooling
• The temperature record is simply unreliable
• Climate scientists dodge the subject of water vapor
• There is no proof that CO2 is causing global warming
• Current global warming is just part of a natural climate cycle
• It was warmer during the Holocene Climatic Optimum
• The medieval warm period was just as warm as today
• What's wrong with warmer weather?
• Kyoto is a big effort for almost nothing
• CO2 doesn't lead, it lags
• There is no consensus
• Antarctic ice is growing
• Warming is due to the Urban Heat Island effect
• Greenland used to be green
• What about mid-century cooling?
• The null hypothesis says global warming is natural
• Geological history does not support CO2's importance
• Climate is always changing
• Global warming is nothing new!
• The CO2 rise is natural
• Historically, CO2 never caused temperature change
• James Hansen has been wrong before
• Position statements hide debate
• But the glaciers are not melting
• If aerosols are blocking the sun, the south should warm faster
• Antarctic sea ice is increasing
• Consensus is collusion
• They predicted global cooling in the 1970s
• Peiser refuted Oreskes
• Water vapor accounts for almost all of the greenhouse effect
• Chaotic systems are not predictable
• The hockey stick is broken
• Observations show climate sensitivity is not very high
• Sea level in the Arctic is falling
• We are just recovering from the LIA

[edit] 2 SkepticalScience

This full list, ordered by frequency of appearance on the 'web, is orginally from here: http://www.skepticalscience.com/argument.php

• It's the sun
• Climate's changed before
• There is no consensus
• Surface temp is unreliable
• Models are unreliable
• Al Gore got it wrong
• Ice age predicted in the 70's
• CO2 lags temperature
• Mars is warming
• Antarctica is cooling/gaining ice
• Global warming is good
• Hurricanes aren't linked to global warming
• 1934 - hottest year on record
• It's cosmic rays
• We're heading into an ice age
• It's Urban Heat Island effect
• It hasn't warmed since 1998
• Other planets are warming
• Greenland was green
• Hockey stick was debunked
• It's water vapor
• It's freaking cold!
• Mt. Kilimanjaro's ice loss is due to land use
• We're coming out of an ice age
• It cooled mid-century
• Human CO2 is a tiny % of CO2 emissions
• It warmed before 1940 when CO2 was low
• Glaciers are growing
• Greenland is cooler/gaining ice
• Neptune is warming
• Satellites show no warming in the troposphere
• Climate sensitivity is low
• There is no empirical evidence
• Jupiter is warming
• Scientists can't even predict the weather
• Less than half of published scientists endorse global warming
• It's the ocean
• It's aerosols
• It's volcanoes (or lack thereof)
• CO2 measurements are suspect
• It's Solar Cycle Length
• It's methane
• Naomi Oreskes' study on consensus was flawed
• Water levels correlate with sunspots
• Solar cycles cause global warming
• The sun is getting hotter
• It's the ozone layer