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Questions tagged [climate-change]

Climate change is a significant and lasting change in the statistical distribution of weather patterns. In public discourse, often used as a shorthand for the effects of anthropogenic global warming.

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Do human activities contribute to climate change?

There is lots of evidence that I have seen showing correlation between human activities and climate change but what evidence is there to support causation?
david4dev's user avatar
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26 votes
5 answers
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Does CO₂ cause Global Warming?

I know there is global warming, and I know that it is caused by human activity, but is carbon dioxide the cause of it? I read somewhere that apparently increase of CO₂ doesn't cause the increase in ...
Thursagen's user avatar
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20 votes
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Have global surface temperatures not shown significant warming since the late 1990s?

Those skeptical about the science of global warming have frequently alleged that the surface temperature record has "paused" since about 1998 and showed no significant warming trend (see this recent ...
matt_black's user avatar
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31 votes
2 answers
4k views

Does this graph show climate-change predictions don't meet observations?

Dr. Roy Spencer, a climate change contrarian, posted this graph on his blog claiming that observed temperature trends are much lower than what climate models predict: Is Spencer misrepresenting what ...
James Christopher's user avatar
25 votes
3 answers
3k views

Will global warming reduce available oxygen?

I saw a friend "like" this news article on Facebook which claims that phytoplankton would stop oxygen production: "If the world’s oceans warmed by 6 degrees Celsius—a realistic possibility if ...
Chad's user avatar
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19 votes
1 answer
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Has global mean temperature at sea level increased since 1900?

It is generally accepted that the Earth's global mean (average) temperature has varied throughout history. Given the difficulties of accurately measuring and calculating temperatures across the ...
ropable's user avatar
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13 votes
1 answer
1k views

Are the IPCC climate change models overestimating sensitivity to carbon dioxide?

A recent report in The Register suggests that we might be currently overestimating the degree to which the world will warm with increasing carbon dioxide. Climate sensitivity is, crudely, the slope of ...
matt_black's user avatar
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9 votes
5 answers
1k views

Do the recent CLOUD results have significant implications for global warming?

According to this Science Daily summary of a recent paper published in Nature and the abstract at Nature, a recent result indicates that cosmic rays play a larger role in cloud formation than was ...
Larry OBrien's user avatar
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8 votes
3 answers
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Is half of the climate change in the past 110 years due to natural variation in the Sun's output?

A NASA website says: Of the many trends that appear to cause fluctuations in the Sun’s energy, those that last decades to centuries are the most likely to have a measurable impact on the Earth’s ...
DavePhD's user avatar
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49 votes
4 answers
14k views

Does the logarithmic nature of global warming invalidate climate change claims?

NOTE It is rather unfortunate that I initially omitted the crucial part of the article I linked below (because the wording was stilted and confusing), and I was rather imprecise in my own claims. ...
Robert Harvey's user avatar
48 votes
3 answers
9k views

Did the Arctic Ice Sheet grow by 60% from 2012 to 2013?

I came across this picture on Facebook. The image claims to have been taken from a NASA satellite. I am skeptical this is correct, and if it is, does it show the ice sheet has increased in size ...
Zonata's user avatar
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27 votes
3 answers
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Did we have a "global cooling" 40 years ago?

I was reading Superfreakanomics and the book argues that we had a global cooling period 40 years ago? Is that claim accurate?
Vinoth Kumar C M's user avatar
21 votes
2 answers
6k views

Are the 16 scientists who claim that climate change is not something to worry about climate scientists?

This is a pretty specific question – in the Wall Street Journal article dated January 27, 2012 entitled "No Need to Panic About Global Warming. There's no compelling scientific argument for drastic ...
Brian M. Hunt's user avatar
20 votes
1 answer
2k views

Did the development of agriculture prevent an ice age occurring?

The television program How the Earth Made Us has argued that the development of agriculture prevented a new ice age, due to methane production from livestock, and the burning of natural vegetation for ...
Golden Cuy's user avatar
18 votes
3 answers
1k views

Could Global Warming be good for life?

A paper from Nature Geoscience (reported by the BBC here) claims that the carbon dioxide humanity has pumped into the atmosphere is holding off a new Ice Age. This has revived an old idea best ...
matt_black's user avatar
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14 votes
2 answers
2k views

Is global warming irreversible?

I have heard countless times the perils of global warming and how we should all do our fair share to save the Earth for future generations. Here is but one example from an NPR article: "Global ...
Paul's user avatar
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14 votes
2 answers
2k views

Was the cretaceous the last time atmospheric carbon dioxide was significantly higher than it is today?

Dr. Michael E. Mann recounts a story in his recent book (the Hockey Stick and the Climate Wars) about an encounter with Hillary Clinton during a hostile congressional hearing. While he was fending off ...
matt_black's user avatar
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7 votes
1 answer
624 views

Does temperature drive CO₂?

The blog THE HOCKEY SCHTICK claims that "temperature drives CO2 levels, not man-made CO2". The paper "Atmospheric verification of anthropogenic CO2 emission trends" is cited as proof. The claim is ...
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7 votes
0 answers
657 views

Is climate change already killing people and costing billions in the USA?

According to Gizmodo: Climate change will make our lives worse in the years to come, but a new report out last week highlights the stark costs people are already paying across the Atlantic. In 2012 ...
matt_black's user avatar
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104 votes
4 answers
27k views

Does the production of a Tesla battery produce as much CO2 as driving 200,000 km?

Recently I read on Greenpeace's website, that the production of a 100 kWh battery, as in the Tesla Model S, produces as much CO2 as driving a regular car for 200,000 km. Source: Tesla car ...
user1721135's user avatar
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61 votes
3 answers
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Does the ratio of ¹⁴C in the atmosphere show that fossil fuels are not the dominant cause of global warming?

I stumbled upon the following paper Skrable et al. (2022) The specific activity of ¹⁴C in the atmosphere gets reduced by a dilution effect when fossil CO₂, which is devoid of ¹⁴C, enters the ...
CuriousIndeed's user avatar
36 votes
4 answers
14k views

Are we in a low CO2 period, compared to the last 590 million years?

In 2012 Burt Rutan, the aircraft designer, posted these slides summarizing his take on global warming/climate change. Slide 14 is In the big picture we are now in a low CO2 period. The 20th ...
Mike Dunlavey's user avatar
33 votes
2 answers
3k views

Did "global cooling" have as much scientific consensus as "global warming" has now?

it is projected that man's potential to pollute will increase 6 to 8-fold in the next 50 years. If this increased rate of injection... should raise the present background opacity by a factor ...
vartec's user avatar
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32 votes
2 answers
2k views

Is Donald Trump forcing the EPA to take down all climate change information?

According to the Independent article Donald Trump orders Environmental Protection Agency to delete all climate change information from its website The Trump administration is forcing the ...
Sklivvz's user avatar
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31 votes
7 answers
5k views

Is it accurate to say that 97% of experts agree that global warming is anthropogenic?

A recent spate of newspaper headlines reported that 97% of scientists agreed with the theory of anthropogenic global warming (AGW). The UK's Daily telegraph reported: A review of 12,000 scientific ...
matt_black's user avatar
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24 votes
3 answers
8k views

Does global warming trap as much heat as 600,000 Hiroshima-class bombs every day?

In January 2023, in an interview at the World Economic Forum, former US Vice President Al Gore claimed that we're adding the equivalent of 600,000 Hiroshima bombs every day in heat to the atmosphere: ...
enorl76's user avatar
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23 votes
2 answers
1k views

Is the world warmer now than during the Medieval Warm Period?

Climate change seems to polarise comment into denialists and believers. But good skeptics should be able to address specific issues with the data without falling into the anti-science denialist camp. ...
matt_black's user avatar
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23 votes
1 answer
1k views

Did Elon Musk's bitcoin transactions release more carbon in a few days than the amount saved by all Teslas ever sold?

In The Guardian, on May 29, 2021, Adam Greenfield writes: Elon Musk’s recent large-scale transactions in proof-of-work-based Bitcoin released more carbon into the atmosphere in just a few days than ...
krubo's user avatar
  • 724
21 votes
1 answer
4k views

Does unadjusted NASA climate data show no long-term global warming?

The Real Science blog by "Steven Goddard" claims that NASA have altered their data in the USA and other countries to show global warming. Right after the year 2000, NASA and NOAA dramatically ...
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17 votes
2 answers
2k views

Would avoiding the eating of meat stop global warming? [duplicate]

Possible Duplicate: Is being a vegan more environmentally friendly than otherwise? Would it be sufficient for people to stop eating meat to stop global warming? I've heard that the process to ...
Rabskatran's user avatar
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15 votes
2 answers
848 views

What are the greatest successes of long term climate prediction?

Seth Roberts claims that the field of climate modelling hasn't produced models that have effectively predicted future climate events. According to him the models are only validated on past data. Is ...
Christian's user avatar
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14 votes
3 answers
844 views

Did global warming exacerbate the Syrian conflict?

Newspapers have recently reported that research shows that Global Warming can now be assigned as a major contributor to the ongoing conflict in Syria. For example, The Independent: Climate change was ...
matt_black's user avatar
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14 votes
4 answers
3k views

Are global temperatures cooler in 2017 than 2007?

The Global Warming Policy Forum claimed (9-Aug-2017): An inconvenient truth: Global temps were warmer when Al Gore won the 2007 Nobel Prize than today, even after the 2015/16 super El Nino. This is ...
Jacob Blaustein's user avatar
13 votes
1 answer
854 views

Is avoiding global warming by preventing CO₂ emissions far too expensive compared to geoengineering or adapting to a warmer world?

Experts in the science of global climate change often criticise their opponents by disparaging their expertise in climate science. But experts in climate science are not experts in economics. So when ...
matt_black's user avatar
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12 votes
1 answer
889 views

Could global warming lead to an oxygen shortage by 2100? [duplicate]

In this report of a mathematical model (original paper here) about the response of ocean plankton to climate change, its author claims the following: By 2100, the earth at sea level could have ...
matt_black's user avatar
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11 votes
1 answer
533 views

Can some simple, old models of the effect of CO₂ predict temperature better than complex modern climate simulations?

A recent post on the climate skeptic blog climateaudit.org showed some comparisons of the relationship between world temperature and CO2 over the 20th century from a simple model originally published ...
matt_black's user avatar
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11 votes
2 answers
3k views

Does having one fewer child reduce my carbon footprint as much as 71+ people going vegan?

In July 2017, ScienceMag reported on a study: Eating no meat cuts an individual’s carbon footprint by 820 kilograms of carbon dioxide (CO2) each year [...] by choosing to have one fewer child in ...
Gnubie's user avatar
  • 521
11 votes
1 answer
547 views

Are polar bears doing well despite a reduction in sea ice?

From Skeptical Science and many other sources: In conclusion, the reason polar bears have been classed as threatened comes from the impacts of future climate change on the bears’ habitat. Current ...
gerrit's user avatar
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10 votes
1 answer
2k views

Do candles emit ten times the carbon dioxide of an equivalent lightbulb?

In Wasteful Earth Hour?, it's claimed that candles emit roughly 10 times the carbon dioxide of light bulbs of the same brightness. While emissions will vary depending on the candle, the lightbulb and ...
Golden Cuy's user avatar
9 votes
2 answers
1k views

Does climate change mean that weather becomes more variable in addition to being warmer?

In public media the notion that climate change is more than global warming gets repeated frequently. Are there strong predictions that show that the climate becomes more irregular? Would we expect the ...
Christian's user avatar
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8 votes
1 answer
2k views

Are glaciers melting?

There seems to be a scientific consensus that glaciers are melting. For instance: Buzzle (Non-peer reviewed web-article): The last century has been a problem for glaciers across the globe. They ...
JSideris's user avatar
  • 237
7 votes
0 answers
257 views

Are there alternative methods of meat production (such as free-range meat) that are better for the environment than factory farmed meat? [duplicate]

Possible Duplicate: Organic food is worse for the environment because it requires more land than non-organic food Most meat in developed nations is produced by Industrial agriculture methods, ...
Sam I Am's user avatar
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5 votes
2 answers
831 views

Did UK Met Office claim in 2012 that global warming stopped 16 years ago?

Not the most respectable source, nevertheless mainstream newspaper Daily Mail claimed that: Global warming stopped 16 years ago, reveals Met Office report quietly released... and here is the ...
vartec's user avatar
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4 votes
3 answers
594 views

Has climate change measurably increased the likelihood of tropical storms such as Haiyan?

The recent extreme tropical storm Haiyan has brought the relationship between cyclones and climate change back into the newspaper headlines. This recent headline from Britain's Daily Mirror suggests ...
matt_black's user avatar
  • 56.2k
3 votes
2 answers
388 views

Does Carbon Dioxide mix well in the atmosphere?

At Skeptical Science, they explain: Mauna Loa is often used as an example of rising carbon dioxide levels because its the longest, continuous series of directly measured atmospheric CO₂. The reason ...
user19459's user avatar
3 votes
2 answers
629 views

Is there more global sea ice than 35 years ago?

On Mail Online, it is claimed: In fact, across the globe, there are about one million square kilometres more sea ice than 35 years ago, which is when satellite measurements began. Is that true? ...
user avatar
3 votes
1 answer
748 views

Have 95% of climate models over-forecast the global warming trend? [duplicate]

From Top Advisor To Australian Gov't Says Climate Change is a UN Conspiracy (slashdot.org) and Climate change a UN-led ruse, says Tony Abbott's business adviser Maurice Newman (The Sydney Morning ...
Brian M. Hunt's user avatar
2 votes
5 answers
836 views

Will a warming world directly damage human health?

It is widely believed that a warming world will be a worse world (but see this question for a discussion of the minority view: Could Global Warming be good for life?) The medical community seems to ...
matt_black's user avatar
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