Global Circulation Models (sometimes called global climate models) have made wrong average temperature predictions for 30 years simply because they are based on the wrong climate physics model (CO2 is the climate controller).
No one understands exactly what causes climate change.
That's why its impossible to develop a correct climate physics model.
Possible causes of climate change include the following, not in the order of importance, because no one knows that:
(1) the sun / cosmic rays,
(2) water (vapor / clouds / oceans / ocean currents, ENSO),
(3) “greenhouse gasses”,
(4) aerosols,
(5) albedo,
(6) Earth's core,
(7) unknown factors / feedbacks, and
(8) planet / sun geometry changes (long term climate change).
No “climate scientist” can provide a more specific explanation of what causes climate change — especially the short term changes (+/- 1 or 2 degrees C. , over a century or two).
The climate models are a waste of taxpayers' money — worthless computer games!
Most "climate scientists” on government payrolls are also wasting taxpayers' money.
They will only be hired if they say they believe CO2 controls the climate.
They will only keep their jobs if they continue to believe CO2 controls the climate.
The climate in 2017 is better for human health, human comfort and green plant growth, than it has been in at least 500 years.
There is no climate problem.
There has been no abnormal climate change in the past 150 years.
In 150 years the average temperature has remained in a tight 1 degree C. range.
There is no need to make wild guess predictions of the future climate.
The wild guesses have been wrong for 30 years so far.
Even worse would be overreacting to wild guesses.
Some politicians have a need for more attention and power.
Politicians can get both by scaring ordinary people with the false claim that CO2 controls the climate.
If they can convince people CO2 added by burning fossil fuels, will cause runaway global warming, and that will eventually end all life on Earth, the people will demand action!
And then politicians launch their biggest lie if all -- claiming only they can save the planet.
A logical person would burst out laughing after hearing that -- the planet does not need saving -- the climate is wonderful and has been getting better for 150 years!
Unfortunately, there are a lot of gullible people (mainly leftists) who believe whatever a leftist politician tells them.
The politicians and their hired guns -- the "scientist believers" they hire -- make an excellent team of scaremongers!
In recent years the climate scaremongers have been like storytellers around a nighttime campfire, competing for who can tell the scariest climate story.
Please don't be gullible.
Get outside.
The climate is wonderful.
The US was much hotter in the 1930s -- be glad if you were not around back then.
The claim that humans can predict the climate, especially the claim of runaway warming, is the biggest hoax in human history.
The entire "era of manmade CO2 since 1940" has had perhaps +0.5 degrees C. of warming -- no warming from 2000 to 2015 -- with a margin of error that could be +/- 1 degree C.
The majority of our planet has no surface temperature measurements, so bureaucrats fill in their wild guesses.
There are parts of Africa claimed to have record surface heat in 2017 ... in spite of the fact that there are no thermometers there to measure the temperature!
Enjoy the wonderful climate.
Ignore the leftist scaremongers.
They don't know any more about the climate 100 years from now than a village idiot -- probably less -- a village idiot might say "I don't know", which is the right answer.
There are plenty of other things to worry about besides bogus claims of a coming climate catastrophe!