13 Misconceptions About Global Warming

13 Misconceptions About Global Warming


Let’s talk about the science of climate change.
Don’t you mean Global Warming? How’d you get in here?
I’m the Internet, I never left. Now why’d you change the name? Global warming wasn’t
happening so you had to call it “Climate Change”? The overall average temperature of the planet
is increasing so Global Warming is technically correct, but that doesn’t mean it’s going
to be warmer everywhere all the time. And that leads to some confusion, like on
a cold winter’s day, you might say… So much for global warming!
Exactly. So the term climate change indicates that
the problem is more intense storms, droughts and floods, ocean acidification, not just
that the globe is warming. But it’s not.
What? The globe’s not warming.
Since when? 1995
Um, that’s not how you draw a trendline through data.
If the slope is nil, the climate’s chill. Y’know thirteen of the fourteen hottest years
occurred this century and the graph you’re using is old, it doesn’t include satellite
data. If you take that into a count, the trend is obviously continuing upwards.
Oh, so now you say it’s warming. In the past scientists told us it was cooling. Why can’t
they just admit that they have no idea what’s going on?
It’s true in the 1970’s there were some papers published predicting cooling, but over that
same time period there were six times as many papers predicting warming. So scientists really
haven’t changed their tune. Well just judging by temperatures, I say they’re
wrong. The Earth is cooling. But you don’t just have to go by temperatures.
There are plenty of other signs that the globe is warming, like sea levels are rising three
millimetres a year. That’s an indication that the oceans are getting warmer and so are expanding.
Ice on Antarctica and Greenland is melting at unprecedented rates and arctic sea ice
continues to decline. Nuh-uh. Arctic sea ice increased forty percent
in the last two years. That last little uptick? That’s what you focus
on? What about the general downward trend? It could mean anything. You know if the Earth
is warming the most likely source of the problem is the sun. The sun is getting brighter. Did
you ever think of that? The sun was getting brighter, in the 1930’s,
and it probably contributed to some warming then. But since the 50’s the sun has been
getting dimmer and temperatures continue to rise.
Oh, so you automatically assume it’s man-made CO2.
You know humans only emit a tiny fraction of the CO2 released into the atmosphere every
year. That’s true. People emit about 30 gigatonnes
compared with 780 gigatonnes from natural land and ocean processes.
So you admit it, humans aren’t the problem. No! Before us the system was in balance with
the land and oceans absorbing that same amount – 780 gigatonnes a year.
This balance kept the carbon dioxide levels in the atmosphere between 180 and 280 part
per million for 800,000 years. Now it’s at 400 parts per million and still rising.
But our small contribution couldn’t have caused that.
Well the amount of CO2 in the atmosphere is increasing by about fifteen gigatonnes or
two parts per million every year. But how do you know that’s man-made CO2?
Because the isotope carbon-13 is less common in fossil fuels than it is naturally in the
atmosphere. And over time we’re seeing the concentrations of carbon-13 are decreasing.
But volcanoes emit way more CO2 than humans. No they don’t. They emit about 0.25 gigatonnes
annually. That’s less than one percent as much as humans.
OK, well even if we are responsible for the rise in CO2, it doesn’t matter because water
is by far the most potent greenhouse gas. Yes it is.
I win. No you don’t!
Water in the atmosphere is increasing as well. But that can’t be due to human activity.
The only way for the atmosphere to hold more water vapour is if it gets warmer. So…
Hang on, you’re not saying… Yes! It all comes back to CO2. A doubling
of CO2 on its own would increase the temperature of the globe by one degree Celsius. But that
warming means there will be more water vapour in the atmosphere and ice will melt reducing
the reflectivity of Earth’s surface. So it’s a positive feedback loop, which a bunch of
different sources of evidence all indicate will lead to about a 3 degree Celsius rise
in temperature. But if this is true, why have all the predictions
failed. In actuality most of the predictions show remarkable agreement with observations.
But you’re probably thinking of the model from 1988, back when we thought climate sensitivity
was higher. If you re-run that model with 3 degrees of warming for every doubling of
CO2, the predictions match exactly the warming that we’ve observed.
But the Earth has warmed and cooled in the past. So who was releasing CO2 then, aliens?
We understand that past changes in the climate were triggered at regular intervals by Milankovitch
cycles, that is the periodic oscillation of the Earth’s tilt, precession of the tilt,
and stretching and squishing of Earth’s elliptical orbit.
During every warming cycle, CO2 and temperature rise together.
Ah, but if you look closely at that graph, you’ll see that CO2 lags behind the temperature
rise, so it can’t be causing the warming. The CO2 doesn’t cause the first warming. The
Milankovitch cycles change the way the sunlight hits the Earth and that causes a little bit
of warming decreasing the solubility of CO2 in the oceans. So some of that CO2 is released
and that is a positive feedback loop, which amplifies the warming. In fact over 90% of
the increase happens after the CO2 starts to rise.
Let’s say you’re right, and the CO2 we’re releasing is warming the planet. What’s so
bad about that? The planet gets a little warmer, big deal.
I’m not claiming it’s going to be some sort of crazy catastrophe, but we are going to
get more intense storms, more droughts and floods, the oceans will become more acidic,
sea levels will rise and my point is it would be better for all species on this planet and
probably cheaper for us if we just started reducing emissions now than if we wait and
pay the consequences later. No thanks.
Why are you wearing sunglasses? Global warming.
This episode of Veritasium was supported by Audible.com a leading provider of audiobooks
with over 150,000 titles in all areas of literature including fiction, non-fiction, and periodicals.
This week I wanted to recommend the book Merchants of Doubt, which is about scientists who have
spread misinformation about certain topics like how cigarettes cause lung cancer, or
how CFC’s cause the ozone hole, or now how CO2 is causing the planet to warm. So if you
want to find out more about that you can download this book by going to audible.com/veritasium
or you can pick any other book of your choosing for a one month free trial. So I want to thank
Audible for supporting me, and I want to thank you for watching.

27 COMMENTS

    Climate change is propoganda designed to scare people into giving up their rights for the greater good. Humans never learn

    Ok you want to reduce emissions. How about we build more nuclear power plants. Honestly it's the best clean energy we got

    Please help as it is minus 31 below zero in Churchill Manitoba tonight – if there is any way to send some global warming heat up there it would be as I have a few friends who are very cold. Thank you.

    Climate change is not going to harm anything but people. Remember that it is a natural process of the earth and oceans levels have been far lower and higher in the past. Same with temperature. If humans are to blame I say being it on, mother nature will sort it out.

    If global warming is true and we're ALL GOING TO DIE withen 10-20 years,

    Then why the F are banks trying to give me 30 year loans.

    This is embarrassing. Please do your research again and make a new video that is not highly biased. There are so many flaws in your arguments.

    Nice references to a lot of garbage data.

    Probably should include everything since before the industrial age which does disprove climate change CO2 alarmism.

    Also remember the Cambrian explosion when CO2 was at its highest globally of all time, that was when life literally erupted across the planet.

    I am very disappointed that you haven't done the real research. I respect you as a scientist but you are being political here instead of factual. Watch Tony Heller videos. He knows what he is talking about.

    this was great. i used to think global warming was a fiction invented by the left to force us into socialism and government dominance. and i used to say a lot of things the denier guy said. but as i researched and looked into it i came to the same conclusion this guy did. the left just uses this to get socialism and more government. but it doesnt change that its real. and i think for most deniers that is the fear. that its all fake because the left supports it. but what the right/ republicans/ conservatives need to realize is that its real and the left is using it. so what we should really do is come up with better solutions then the left that doesn't steal our freedoms. forcing out cows, chopping down planes, and forcing people into batteries that drive arn't the best solutions. there are many ways to reduce carbon. and America is one of the countries doing this the best. we need to get other countires on board with reduction. we need to cut laws that ban people from using solar, wind or being off grid. we need to find renewable resources to power cars. lets get into thorium reactors, build smarter safer nuclear reactors that if they break down we can safely discharge them with out the radiation spill. oh yeah thats thorium. lets invest in sustainability not just ban ban ban. you want to change peoples minds and make products that work for people. not ban ban ban them from what they love. you have to slowly work it out. people dont use telephones any more. we use cell phones now. but there are some old folks who hate cell phones. dont ban them from their phones just teach the new kids to love sustainable products. insentivise not ban. give people tax breaks for inventing new products that are renewable and dont produce carbon emissions. make it cheap for them to get it to market for the average person so they can get rich off it. thats why we change the future. we make sustainability affordable and money producing.

    Arctic sea ice shrinking? Lmao. It's been growing steadily again, even after the "heatwave" alarmism of 2019: https://www.youtube.com/watch?v=ieDl06jLLfY

    Average global temperature always tops out at 25° C, whether atmospheric CO2 is 7000 ppm, or below 300 ppm. Earth takes care of itself. We cannot change climate one way or the other. If you disagree, please explain in light of these data shown in this well known graph. My interpretation of these data is that atmospheric CO2 has nothing to do with average global temperature.
    https://miro.medium.com/max/990/0*3Vm0copgT8K-pcRm.gif

    1 minute in and I am unsubscribing to the channel . you should have stayed away from the topic, instead you have shown yourself to be a useless social media pawn… so much misinformation and misrepresentation of the actual data… good bye

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