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| 1 |
"It's the sun" |
The sun's output has barely changed since 1970 and is irrelevant to recent global warming. |
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| 2 |
"Climate's changed before" |
Climate reacts to whatever forces it to change at the time, which now is dominated by humans. |
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| 3 |
"There is no consensus" |
97% of climate experts agree humans are causing global warming. |
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| 4 |
"It's cooling" |
The last decade 2000-2009 was the hottest on record. |
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| 5 |
"Models are unreliable" |
Models successfully reproduce temperatures since 1900 globally, by land, in the air and the ocean. |
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| 6 |
"Temp record is unreliable" |
The warming trend is the same in rural and urban areas, measured by thermometers and satellites. |
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| 7 |
"It hasn't warmed since 1998″ |
2005 was the hottest year globally, and 2009 the second hottest. |
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| 8 |
"Ice age predicted in the 70s" |
The vast majority of climate papers in the 1970s predicted warming. |
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| 9 |
"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. |
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| 10 |
"Antarctica is gaining ice" |
Satellites measure Antarctica losing land ice at an accelerating rate. |
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| 11 |
"CO2 lags temperature" |
Recent CO2 increase has caused recent warming without any time lag. |
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| 12 |
"It's not bad" |
Negative impacts of global warming on agriculture, health & environment far outweigh any positives. |
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| 13 |
"Al Gore got it wrong" |
Al Gore book is quite accurate, and far more accurate than contrarian books. |
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| 14 |
"It's cosmic rays" |
Cosmic rays show no trend over the last 30 years & have had little impact on recent global warming. |
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| 15 |
"It's freaking cold!" |
A local cold day has nothing to do with the long-term trend of increasing global temperatures. |
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| 16 |
"Hurricanes aren't linked to global warming" |
There is increasing evidence that hurricanes are getting stronger due to global warming. |
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| 17 |
"1934 – hottest year on record" |
1934 was one of the hottest years in the US, not globally. |
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| 18 |
"Hockey stick is broken" |
Recent studies agree that recent global temperatures are unprecedented in the last 1000 years. |
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| 19 |
"Mars is warming" |
Mars is not warming globally. |
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| 20 |
"It's Urban Heat Island effect" |
Urban and rural regions show the same warming trend. |
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| 21 |
"It's just a natural cycle" |
Ancient natural cycles are irrelevant for attributing recent global warming to humans. |
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| 22 |
"Arctic icemelt is a natural cycle" |
Thick arctic sea ice is undergoing a rapid retreat. |
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| 23 |
"Sea level rise is exaggerated" |
A variety of different measurements find steadily rising sea levels over the past century. |
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| 24 |
"Water vapor is the most powerful greenhouse gas" |
Rising CO2 increases atmospheric water vapor, which makes global warming much worse. |
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| 25 |
"Other planets are warming" |
Mars and Jupiter are not warming, and anyway the sun has recently been cooling slightly. |
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| 26 |
"Greenland was green" |
Other parts of the earth got colder when Greenland got warmer. |
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| 27 |
"Oceans are cooling" |
The most recent ocean measurements show consistent warming. |
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| 28 |
"Climategate CRU emails suggest conspiracy" |
Several investigations have cleared scientists of any wrongdoing in the media-hyped email incident. |
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| 29 |
"Human CO2 is a tiny % of CO2 emissions" |
Human-caused CO2 emissions upset the natural balance and are causing global warming. |
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| 30 |
"Climate sensitivity is low" |
Net positive feedback is confirmed by many different lines of evidence. |
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| 31 |
"CO2 effect is weak" |
The strong CO2 effect has been observed by many different measurements. |
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| 32 |
"We're coming out of the Little Ice Age" |
The sun was warming up then, but the sun hasn't been warming since 1970. |
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| 33 |
"It cooled mid-century" |
Mid-century cooling involved aerosols and is irrelevant for recent global warming. |
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| 34 |
"Glaciers are growing" |
Most glaciers are retreating, posing a serious problem for millions who rely on glaciers for water. |
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| 35 |
"It warmed before 1940 when CO2 was low" |
Early 20th century warming is due to several causes, including rising CO2. |
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| 36 |
"There's no empirical evidence" |
There are multiple lines of direct observations that humans are causing global warming. |
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| 37 |
"Polar bear numbers are increasing" |
Polar bears are in danger of extinction as well as many other species. |
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| 38 |
"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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| 39 |
"Mt. Kilimanjaro's ice loss is due to land use" |
Most glaciers are in rapid retreat worldwide, notwithstanding a few complicated cases. |
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| 40 |
"IPCC does not represent a scientific consensus" |
The IPCC summarizes the recent research by leading scientific experts. |
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| 41 |
"Extreme weather isn't caused by global warming" |
Extreme weather events are being made worse by global warming. |
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| 42 |
"CO2 is not a pollutant" |
Excess CO2 emissions will lead to hotter conditions that will stress and even kill crops. |
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| 43 |
"There's no correlation between CO2 and temperature" |
There is long-term correlation between CO2 and global temperature; other effects are short-term. |
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| 44 |
"Greenland is gaining ice" |
Greenland on the whole is losing ice, as confirmed by satellite measurement. |
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| 45 |
"CO2 was higher in the past" |
When CO2 was higher in the past, the sun was cooler. |
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| 46 |
"Scientists can't even predict weather" |
Weather and climate are different; climate predictions do not need weather detail. |
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| 47 |
"There's no tropospheric hot spot" |
We see a clear "short-term hot spot" – there's various evidence for a "long-term hot spot". |
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| 48 |
"Neptune is warming" |
And the sun is cooling. |
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| 49 |
"Jupiter is warming" |
Jupiter is not warming, and anyway the sun is cooling. |
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| 50 |
"It's Pacific Decadal Oscillation" |
The PDO shows no trend, and therefore the PDO is not responsible for the trend of global warming. |
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| 51 |
"CO2 effect is saturated" |
Direct measurements find that rising CO2 is trapping more heat. |
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| 52 |
"Pluto is warming" |
And the sun has been recently cooling. |
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| 53 |
"Greenland ice sheet won't collapse" |
When Greenland was 3 to 5 degrees C warmer than today, a large portion of the Ice Sheet melted. |
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| 54 |
"Volcanoes emit more CO2 than humans" |
Humans emit 100 times more CO2 than volcanoes. |
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| 55 |
"Animals and plants can adapt to global warming" |
Global warming will cause mass extinctions of species that cannot adapt on short time scales. |
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| 56 |
"Medieval Warm Period was warmer" |
Globally averaged temperature now is higher than global temperature in medieval times. |
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| 57 |
"CO2 measurements are suspect" |
CO2 levels are measured by hundreds of stations across the globe, all reporting the same trend. |
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| 58 |
"It's the ocean" |
The oceans are warming and moreover are becoming more acidic, threatening the food chain. |
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| 59 |
"It's El Niño" |
El Nino has no trend and so is not responsible for the trend of global warming. |
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| 60 |
"Arctic sea ice is back to normal" |
Thick arctic sea ice is in rapid retreat. |
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| 61 |
"Less than half of published scientists endorse global warming" |
Around 95% of climate experts agree that humans are causing global warming. |
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| 62 |
"Dropped stations introduce warming bias" |
If the dropped stations had been kept, the temperature would actually be slightly higher. |
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| 63 |
"Solar Cycle Length proves its the sun" |
The sun has not warmed since 1970 and so cannot be driving global warming. |
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| 64 |
"It's aerosols" |
Aerosols have been masking global warming, which would be worse otherwise. |
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| 65 |
"It's microsite influences" |
Microsite influences on temperature changes are minimal; good and bad sites show the same trend. |
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| 66 |
"CO2 has a short residence time" |
Excess CO2 from human emissions has a long residence time of over 100 years |
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| 67 |
"It's a climate regime shift" |
There is no evidence that climate has chaotic "regimes" on a long-term basis. |
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| 68 |
"2nd law of thermodynamics contradicts greenhouse theory" |
The 2nd law of thermodynamics is consistent with the greenhouse effect which is directly observed. |
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| 69 |
"Humans are too insignificant to affect global climate" |
Humans are small but powerful, and human CO2 emissions are causing global warming. |
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| 70 |
"It's not happening" |
Recent global warming is occurring and is due to humans. |
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| 71 |
"Greenhouse effect has been falsified" |
The greenhouse effect is standard physics and confirmed by observations. |
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| 72 |
"It's land use" |
Land use plays a minor role in climate change, although carbon sequestration may help to mitigate. |
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| 73 |
"The science isn't settled" |
That human CO2 is causing global warming is known with high certainty & confirmed by observations. |
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| 74 |
"2009-2010 winter saw record cold spells" |
A cold day in Chicago in winter has nothing to do with the trend of global warming. |
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| 75 |
"It's methane" |
Methane plays a minor role in global warming but could get much worse if permafrost starts to melt. |
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| 76 |
"500 scientists refute the consensus" |
Around 95% of climate experts agree that humans are causing global warming. |
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| 77 |
"Mike's Nature trick to 'hide the decline'" |
Michael Mann was quoted out of context, and nothing was hidden. |
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| 78 |
"IPCC were wrong about Himalayan glaciers" |
Glaciers are in rapid retreat worldwide, despite 1 error in 1 paragraph in a 1000 page IPCC report. |
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| 79 |
"Ocean acidification isn't serious" |
Past history shows that when CO2 rises quickly, there was mass extinctions of coral reefs. |
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| 80 |
"Sea level rise predictions are exaggerated" |
Sea level rise is now increasing faster than predicted due to unexpectedly rapid ice melting. |
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| 81 |
"Naomi Oreskes' study on consensus was flawed" |
Benny Peiser, the Oreskes critic, retracted his criticism. |
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| 82 |
"Phil Jones says no global warming since 1995″ |
Phil Jones was misquoted. |
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| 83 |
"Ice isn't melting" |
Ice is melting at an accelerating rate at both poles and in glaciers all over the world. |
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| 84 |
"CO2 is coming from the ocean" |
The ocean is absorbing massive amounts of CO2, and is becoming more acidic as a result. |
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| 85 |
"It's not us" |
Multiple sets of independent observations find a human fingerprint on climate change. |
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| 86 |
"CO2 is not increasing" |
CO2 is increasing rapidly, and is reaching levels not seen on the earth for millions of years. |
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| 87 |
"It's albedo" |
Albedo change in the Arctic, due to receding ice, is increasing global warming. |
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| 88 |
"Record snowfall disproves global warming" |
Warming leads to increased evaporation and precipitation, which falls as increased snow in winter. |
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| 89 |
"Hansen's 1988 prediction was wrong" |
Jim Hansen had several possible scenarios; his mid-level scenario B was right. |
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| 90 |
"Lindzen and Choi find low climate sensitivity" |
Lindzen and Choi's paper is viewed as unacceptably flawed by other climatologists. |
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| 91 |
"The sun is getting hotter" |
The sun's output has just oscillated since 1970 with a slight cooling trend. |
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| 92 |
"Solar cycles cause global warming" |
Over recent decades, the sun has been slightly cooling & is irrelevant to recent global warming. |
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| 93 |
"Springs aren't advancing" |
Hundreds of flowers across the UK are flowering earlier now than any time in 250 years. |
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| 94 |
"Over 31,000 scientists signed the OISM Petition Project" |
The 'OISM petition' was signed by only a few climatologists. |
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| 95 |
"It's waste heat" |
Greenhouse warming is adding 100 times more heat to the climate than waste heat. |
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| 96 |
"Water levels correlate with sunspots" |
This detail is irrelevant to the observation of global warming caused by humans. |
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