The Last Time the Globe Warmed

  • Опубликовано: 4 дек 2017
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    Imagine an enormous, lush rainforest teeming with the Arctic. Well there was a time -- and not too long ago -- when the world warmed more than any human has ever seen. (So far)
    Produced in collaboration with PBS Digital Studios:
    Special thanks to Nobumichi Tamura for allowing us to use his work:
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  • Наука и техникаНаука и техника

Комментарии • 4 904

  • Mark Dowse
    Mark Dowse 11 часов назад

    Life will adapt or perish. Human beings have to adapt.

  • Robert R
    Robert R 19 часов назад

    I'm so sick of these "the Earth warms and cools naturally so humans can't be contributing" arguments. That's like saying "the weather gets warmer and cooler all the time so a heater can't possibly warm my house". Furthermore, if that were true, if this were the natural rate of climate change, that would be _way_ worse. It would be more important and difficult than ever (and require _far_ more funding) to find ways to counteract. Yet I don't hear climate sceptics clamouring about the urgent need to reprioritise climate research. It's so obviously an excuse for people to busy their heads in the sand.

  • turarwanaa
    turarwanaa 22 часа назад

    Probably just a time traveller playing real life Factorio. ^^

  • joke witteman
    joke witteman День назад

    I like this channel. But these people pretend to be scientist who know the "truth" . And they forget to mention a lot. For example: I agree, Humanity has a lot of negative impact on ouer globe but in the period they are comparing to ouers CO2 was twice as high as now and the cause of that is at least debatable , a more active world or a normal natural cycle might just cause that naturally, so why don't they mention that and are they pretending to know it all? Nice channel- butt just for meanstream vieuws - these people, undoubtly very nice people just tell what's in the news without trying to be objective . just trying to be objectve myself.

  • Dean PD
    Dean PD День назад

    Most of us would like them to stay where they are today? Why? There are already reports that the planet is greener. Just goes to show that you can't keep a Greenie happy. A Greenie cannot cope with change yet change is the fundamental aspect of everything.

  • Harvey Birdman
    Harvey Birdman День назад

    Yeah, we smoked chief

  • TheJudge01
    TheJudge01 День назад

    When he said "We'd like for them to stay were they are today", why in the hell did I immediately think of Mexicans? Probably because of the current state we're in. Where we decide for them. I don't know but it was weird and almost funny.

  • surfdeephowder
    surfdeephowder День назад

    Amazing article on polar regions and climate. But there can not be a serious discussion about long term climate, climate change, warming, cooling, etc and not mention the sun and its interaction with the earth. The presumption always seems to be the 'static light bulb' theory. The truth is the sun does not just sit there. It has cycles and moods of its own, and it is firmly in the drivers seat when it comes to climate. The earth too has orbital variations, wobbles, etc. which in turn affects the earth/ sun interaction and climate.

  • Faraz Bolourian
    Faraz Bolourian День назад

    we've had catastrophic mass extinction events that killed 80-90% of all life and life on earth always recovers...species go extinct and new ones evolve its the way of life (even if we don't like it). Should we hunt beautiful animals to extinctions? no. Should we pollute the planet like mad with no worries about the future? no. But we do need to stop listening to the people who say climate change is not real and man made, and we also need to stop listening to the people that say climate change is the most catastrophic event in earth's history and it'll be the end of us...both are lying and both have their own hidden agendas.

    We need to stop polluting and harming the environment with no care for the future, we need to find ways to live more sustainably and ethically and we need to invest in products and technology that will lead to a better future, but we have to do everything strategically and sensibly...without falling for the tall tales of climate change deniers and global warming extremists.

  • jack salerno
    jack salerno 2 дня назад

    The PETM ended most likely because there was such a colossal amount forests and jungles that a lot of the CO2 in the atmosphere was turned into O2, reducing the greenhouse effect and subsequently, ending the PETM.

  • Karren Kuddlesberg
    Karren Kuddlesberg 4 дня назад

    The oxygen was also different back then. Too little can make us faint. Too much can make us explode.

  • James Gundlach
    James Gundlach 4 дня назад

    Why is there a Pentagon report warning about a coming ice age?

  • James Gundlach
    James Gundlach 4 дня назад

    If we dumped more carbon into the atmosphere in 100 years than what was dumped in over the course of thousands of years then hiw come we haven't seen much more exponential increase in global temps and greenhouse effects?

  • Ruth Fitzwater
    Ruth Fitzwater 4 дня назад

    It seems to me that since the earth climate has changed many times over eons and those changes take eons we are wasting our time and money trying to change our effect on climate. Given our tiny size vis à vis the planet and the enormity of what it takes to actually effect change we would do better to use our money to help the poor and to adapt to any changes. In effect, I think that it’s comical to think we can do anything about the climate besides adapt to it.

  • J H. Booth
    J H. Booth 5 дней назад

    This sounds great.

  • Bjørnar Iversen
    Bjørnar Iversen 5 дней назад

    Damn dinosaurs and their factories! 🤣

  • Kevo Morego
    Kevo Morego 5 дней назад

    what about the proven fact that the Earth has flipped over by 45 degrees at least once. That is why tropical plant fossils are found so far north.

  • jorge gallo
    jorge gallo 5 дней назад

    So, does CO2 cause global warming, or does warming cause CO2 to be released? That needs to be answered!

  • Just About Anything
    Just About Anything 7 дней назад

    But it's definitely our fault this time.

  • Mike Gerrie
    Mike Gerrie 7 дней назад

    I'm curious about the fact that even though the atmosphere has more co2 how does that translate to more co2 in water. When I leave a open Club Soda can over night, its completely flat by morning. Would the same thing not happen with the oceans?

  • Jean Genibrel
    Jean Genibrel 7 дней назад

    And it took 4000 years to reach the peak.

  • Thomas Willis
    Thomas Willis 7 дней назад

    What affect does the direction of the north pole verses sun have on seasons over a full 26000 years rotation. Where are we in this rotation( aphealeon, perhealeon position of North south pole verses intermediate position )

  • Ian Dodson
    Ian Dodson 8 дней назад +1

    Why haven't I learned this in school yet😢🧐???

  • Zechariah Horaman
    Zechariah Horaman 8 дней назад

    Is it really the most important thing ever that things don't change?

  • Alexander Thompson
    Alexander Thompson 9 дней назад

    Keep in mind that when he describes the PETM warming period as "sudden", he's still talking about a long time, but its sudden on the geological timescale. Our current rate of change is much, much faster, which has very important implications for life.

  • Dean Overholt
    Dean Overholt 9 дней назад

    so waht heated up the earth to release all this carbon?...the sun maybe? Man's effect is puny compared to the sun. Warming comes first then CO2 and even methane. You have it backwards. Warming is solar...the wild beast that rules our solar system. And more acidic is not possibel for teh sea. YOu do not get PH. The ocean can never become acidic,. There aren't enough carbon atoims to make this ever possibel. ASaying teh ocean becoimes more acidic is jsut bad science. It is a base and way too much buffering to ever become an acid.

    • Nhoj737
      Nhoj737 9 дней назад

      "In the last 35 years of global warming, the sun has shown a slight cooling trend. Sun and climate have been going in opposite directions. In the past century, the Sun can explain some of the increase in global temperatures, but a relatively small amount.
      "Ocean acidification threatens entire marine food chains."

  • Fred Thompson
    Fred Thompson 9 дней назад

    While observing this video, we should have deniers of global warming watch it piled full in a car in the middle of summer, windows up and no A.C. with a crap load of mosquitos and nasty water. That's where we're headed.

  • uncleanunicorn
    uncleanunicorn 10 дней назад

    I wonder how the PETM compares to the heating period that lead to the Great Dying at the Permian Triassic boundary?

  • Robert Orr
    Robert Orr 10 дней назад

    So great. Global warming will create winners and losers, just like in the past. OK. So why the fuss?

  • vincentj
    vincentj 10 дней назад

    So we can finally get year round use of the pool here in New York

  • couldntgivafuk
    couldntgivafuk 10 дней назад

    36 degrees hot as your bath tub? that's just a normal days temp in Australia

  • Zod of Heaven
    Zod of Heaven 11 дней назад

    Not only was it getting too clammy to breathe, but the whole world smelled of poo.

  • Sue Rarick
    Sue Rarick 12 дней назад

    So I should start to build up the number of my Turtle soup recipes and buy some beach property on the Arctic?

  • Game Over
    Game Over 12 дней назад

    The lead host of SciShow :)

  • Aristide Torchia
    Aristide Torchia 13 дней назад

    your average conservative:

  • mhl56
    mhl56 13 дней назад

    Global warming --> Rain forests --> Global cooling.
    If an extreme warm period ended with an extreme cool period, then maybe CO2 is not the cause or even a risk, but other factors?

  • Gunzmith Dragonkind
    Gunzmith Dragonkind 13 дней назад

    the last time the globe was warm it stayed warm for a hundred years.....warm globe = ages are not natural.....and these dumb asses are spouting fear about the planet getting back to it natural warm state

  • Mr Nobody
    Mr Nobody 13 дней назад

    Ice ages are a natural are polar flips.....allowing variations of elements to rise and lower creating an Alchemy of change....the diversity and evoloution of change on our planet....

  • Jerrik Li
    Jerrik Li 13 дней назад

    Big chungus will solve it

  • Hindu Goat
    Hindu Goat 14 дней назад

    its not the duty of the planet to support life
    its not the duty of humans to protect other species

  • Scott Brandt
    Scott Brandt 14 дней назад

    so how many SUVs where there back then and how many coal burning Power Plants where there ??

  • Vir Quisque Vir
    Vir Quisque Vir 14 дней назад

    7:51 - "The cooling remains a mystery." The sun. Or volcanic clouds. Or less volcanic activity. Or a more heat-deflecting upper atmosphere. Or more H2O clouds in general due to more evaporation due to the increased heat... or some combination of these... I don't know, I'm guessing...

  • rick Fischer
    rick Fischer 15 дней назад

    Main takeaway: The natural forces that control the climate are numerous and powerful. The conceit of the Green Environmentalists: humans can override them all by judicious levels of fossil fuel burning.
    Humans can choose what global temperature we desire, and achieve it by precise control of manmade CO2 emissions.

  • The monotheistic cohesion
    The monotheistic cohesion 15 дней назад

    global warming doesn't exist, yes the planet is warming but it got nothing to do with humans in this part of eon

  • Jeff Gold
    Jeff Gold 15 дней назад

    So the earth used to be much warmer , terrestrial life flourished . It warmed for unknown natural reasons and cooled for unknown natural reasons . Co2 levels always rise when the oceans warm since all the dissolved co2 is released by warming waters . The rest is basically speculative fearmongering . I believe temperature rise has fallen since 2016 to about .5 C at present . Not a huge problem since the rise is since the end of the little ice age , the coldest period of the Holocene . We are still below temps of the Holocene optimum .

  • Powder Hungry
    Powder Hungry 15 дней назад

    Wait, CO2 doesn't go away in our atmosphere. So what difference does it make? The polar ice caps are going to keep dying off at this pace even if we stopped 'fueling' it tomorrow. Besides, we're only one country. Look at India, or Saudi Arabia. There are some countries that just burn this shit into the air soooo much worse than we do. There is no stopping it, and there is no fixing it. So, my suggestion. It's here to stay, and the only way we can mitigate it is through technological advancements. Is that what is being suggested?

  • Peter Peterson
    Peter Peterson 15 дней назад

    so, things are going about 5 times faster then back then. so we have 10,000 years. ok. plenty of time for the oil tycoons to die off and alternative power and fuel to be perfected.

  • peterweetbeter
    peterweetbeter 16 дней назад

    This video is too short to explain all "mysteries" of the evolution , also many things we do not know and we make a theory of it.

  • THE RedneckPrincessOfTacticoolness
    THE RedneckPrincessOfTacticoolness 16 дней назад

    Not my polar bears!!!!

  • I'm On Time
    I'm On Time 17 дней назад

    One super volcano event outdoes man's total existence in only a few hours.

  • André Q.
    André Q. 17 дней назад +1

    I was born in the wrong epoch...

  • Arron Roder
    Arron Roder 17 дней назад

    Can we explain yet as to why Mars is rebuilding an atmosphere...
    Im curious as to what is happining solar system wide. Of course we should and must reduce or pollution. But will it matter, if catastrophic events happen much more frequent than we are told to believe? Is the suns capabilities something to (worry) about if like a Carrington event happened today? I do reduce my input of pollution so far as economic and individual decisions allow..

  • Adam Lewellen
    Adam Lewellen 17 дней назад

    Global warming from all the damn fissile fuels

  • Jaime Batista
    Jaime Batista 18 дней назад +13

    I clearly remember that in the seventies we were being told that the earth was cooling-now we are told it's warming..Caves have been found 300 feet under the ocean with stalactites and stalagmites which can only form by dripping water....The earth goes through cycles--maybe we have a effect on things but we can't stop what nature unleashes on earth--volcanoes and all the gases they release--earth wobbling on it's axis--sun spots--solar storms--gamma ray bursts have been accepted as the cause of at least one major extinction event...We seem to always have a reason to worry about something or other...

    • Zak Adams
      Zak Adams 5 дней назад +1

      @+Jaime Batista Voices of reason are never popular with the mainstream. Its acceptance has always been limited to esoteric circles. AGW is contemporary humanity's new religion, so those who subscribe won't be convinced otherwise while the VORs are viewed as heretics. Funny animals us humans.

    • Jaime Batista
      Jaime Batista 5 дней назад +1

      +Zak Adams Zak, it is certainly refreshing to hear the occasional voice of reason...Especially when the social climate seems determined to smother such opinions..

    • Zak Adams
      Zak Adams 5 дней назад +1

      Cyclical our planet is, indeed. Couple that with the fact that too many people stroke their egos by believing that we know so much as a species, when in fact we know very little compared to what there is to know.
      Lately, I've been encountering scientists who posit that warming precedes rises in CO2, not the other way around. Considering that the earth has had epochs with up to 5,000 ppm CO2 in the atmosphere, which the plants must have loved, our insignificant 380 ppm provides no reason to be startled. Plant growth becomes stunted around 150 ppm. When that happens, the O2 levels in the atmosphere would theoretically take a dive. That doesn't bode well for many species.
      As you point out, the sun is yet another factor rarely discussed in mainstream. It also goes through warming and cooling cycles, yet somehow there are those who write it off as an influential variable.
      While we are certainly polluting the air, soil and water, the jury is still out on the culprit of the earth's current changes. Believing otherwise is a trap set by those who determine the status quo.

  • Brendan Cribbs
    Brendan Cribbs 18 дней назад

    There is a technique being developed that encourages the growth of algae blooms in the ocean. This is being done with the hopes that when massive algae blooms die they will sink to the ocean floor with all the CO2 they collected. This could be the technology needed to save our planet.

    • Michael Enquist
      Michael Enquist 17 дней назад

      It wouldn't "save" the planet, just change the way it is changing.

  • Nunya Business
    Nunya Business 19 дней назад

    Turn it up I want palm trees NY

  • gauting musik
    gauting musik 19 дней назад

    Next time please make the video 15 minutes.
    Speak slow. Non native-english listeneres will watch the video, as they will be able to follow.

    • gauting musik
      gauting musik 19 дней назад

      The video is good. The speed of words is too fast. So I think the speaker hides information.

  • Nmethyltransferase
    Nmethyltransferase 19 дней назад

    Achieving millions of years worth of global warming in 100 years to own the libs.

  • Neil Barrett
    Neil Barrett 19 дней назад

    World carbon emissions are expected to peak in 2028. There's less than 50 years of oil left and maybe a 100 years of Natural gas. We are looking at a 200 year pulse in CO2 emissions. It's a lot of emissions, but it's not millions of years. Orbital mechanical solar fluctuations have the Earth going into a 100,000 year glacial period, which keeps cooling the earth, offsetting some of the heating. Natural geologic absorption will continue to reduce greenhouse gases. I think for the next few thousand years humans will be a few degrees warmer, then get very cold.

  • Billys Bilbolag
    Billys Bilbolag 20 дней назад

    6:04 They look just like small Anomalocaris!

  • bobwatters
    bobwatters 20 дней назад

    You heard it here on PBS first folks, global warming hoaxers value fish life over human life.

  • Ē Nihil
    Ē Nihil 20 дней назад

    Let’s adapt to global warming yeye

  • h e l p m e
    h e l p m e 20 дней назад

    What is sand is just broken fossils lmao

  • David Griffiths
    David Griffiths 21 день назад

    It takes many centuries for the ocean to warm up and the ocean is a powerful moderating influence on rising global averages. A ppm range during the thermal maximum would have been a useful item it was about 5000 Gt about 500 years worth at our current rate of emissions or about 2500 ppm up from about 1000 ppm. We have gone from 280 to 411ppm, an increase of 130ppm. However proportionately its up about 50% compared to 150% for the Eocene spike.

  • Earth Man
    Earth Man 21 день назад

    As you say methane is a more powerful greenhouse gas than carbon dioxide. You are right. Even more powerful than either carbon dioxide and methane is water vapor! So, let me ask and answer a question, is carbon dioxide a leading indicator? (Did carbon dioxide go up first, or did global warming?) The answer is that global warming went up BEFORE carbon dioxide went up. Carbon dioxide is a trailing indicator! We don't know why the climate went up (I vote for the sun) but carbon dioxide didn't cause anything.

    • Den Guten
      Den Guten 19 дней назад

      "I vote for the sun". Ok, then what's causing today's climate change? It's certainly not the sun, as there is no increase in solar activity. How do you know that "global warming went up before carbon dioxide went up"? Do you have any legitimate sources backing these claims? And what would cause CO2 levels to rise after an increase in temperature?

  • Lube
    Lube 21 день назад +26

    Global warming gives us rainforests, got it.

    • David Mills
      David Mills 7 дней назад +1

      Absolutely not the case. It turns out according to NASA that the globe has greened up significantly since 1985 due primarily to carbon dioxide which plants need to grow. Moreover a recent study at Yale showed that earth has about 3 trillion trees which is about 7.5 times previous estimates. And trees are a huge sink for CO2.

    • Aravind Karthigeyan
      Aravind Karthigeyan 8 дней назад +1

      Lube To be fair we are destroying them faster than they can regenerate

    • Kevinito9
      Kevinito9 13 дней назад +3

      +Lube thatll make it worse

  • john altyn
    john altyn 21 день назад

    Have these scientists ever considered Solar activity during these shifts in temperatures or Earth's Precession??? Or both including these other natural events? We live in outer space and are flying around our Star, the Sun at about 67,000 MPH (107,000 km) Just some thoughts.

    • Den Guten
      Den Guten 19 дней назад

      Of course they have. I don't know anything about previous climate changes, but the one we experience today is not caused by this, as solar activity is stable.

  • Cernunnos  Wild
    Cernunnos Wild 21 день назад

    You mean ...there are facts based on information (compiled by people who actually do the science and measurements for decades now)? Brilliant.
    Does that mean you should be getting facts from scientist and not political pundits? The 2 are not equal points here.

  • Richard A
    Richard A 21 день назад

    Cold killed over 5 million people last year (Lancet article). How many died from warmth?

  • shubham Dev
    shubham Dev 22 дня назад

    Should also include Continental Drift concept to explain fossils at higher latitudes.

  • Nachuak
    Nachuak 22 дня назад

    I hope that happens with our global warming because I can't stand snow 😉

  • kardiackilla
    kardiackilla 22 дня назад

    Can anyone help me find a novel from my youth, it was about a group of time travelers who go back to just before the cretaceous extinction event but they get stuck and must survive as best they can the meteor striking as well as the post strike winter that in theory killed off the majority of the dinosaurs. I havent been able to find it and its a great novel

  • Robert Mcgee
    Robert Mcgee 23 дня назад

    Sounds like it was great weather on most of the earth! Bring on the warmer weather!

  • Robert Miller
    Robert Miller 23 дня назад

    Don't you even know that? It was cave guys driving around in Hummers.

  • Mauricio Berdugo
    Mauricio Berdugo 23 дня назад

    Rather than focusing on "climate change" (which was conveniently changed from "global warming" after that was debunked), how about focusing on how overpopulated some countries are and how polution in those countries affect the environment?

    • Den Guten
      Den Guten 19 дней назад

      Please tell me how anything was debunked, I'm dying to know.

  • danguee1
    danguee1 24 дня назад

    Can anyone explain to me how - in spite of general global warmness, which I can understand - the polar areas didn't freeze in winter due to lack of sunlight and solar radiant warming?
    Did the ferns and animals not suffer greatly the lack of sun-warming to the point where the lovely lush summer growth got killed in freezing?
    Genuine lack of understanding on my part......

  • KaibaCorp HQ
    KaibaCorp HQ 24 дня назад +2

    Uh oh, Wikipedia article under the video, that must mean RUclip must think it's a conspiracy.

  • NatTheKiwi
    NatTheKiwi 24 дня назад

    If we can’t survive then maybe we could make advanced AI to survive for us. Maybe program them to be humanitarian and life sustaining. Then again, they would be able to outsmart us in the end and may only further our destruction as a species... Why’d we have to go an NESA everything up :L

    • NatTheKiwi
      NatTheKiwi 24 дня назад

      It won’t let me edit on my phone cause I’m not using the app. Mess* not NESA

  • LAWRENCE Winterburn
    LAWRENCE Winterburn 24 дня назад

    What happens when a 300 mile wide asteroid hits the earth? (Hint... there is a 300 mile wide crater beneath antarctica). You may want to look into that.
    There's another in the Gulf of Mexico 110 miles wide. And another beneath Greenland that apparently impacted 12,800 years ago.
    Who is to say that the earth's rotation or orbit has remained constant?

  • Don Beck
    Don Beck 25 дней назад

    The problem here is there is alway speculation, theories , and mysteries. Even his time lines are speculative, there's even variables that are assumed in carbon dating . So I do wish when these videos are put out that there is a we believe or we think or our theory is.

  • Davey R
    Davey R 26 дней назад

    So global warming is not down to Cows Farting.

  • James Stripling
    James Stripling 26 дней назад

    Turning Antarctica into a rain forest? Creating a more hospitable environment for worldwide forestation? Opening up a new seaway over the north pole? Global warming is a bad thing? Maybe not.

  • Brandon Tracy
    Brandon Tracy 26 дней назад

    I want to know how many species died out as a result of this I bet it'll give us a good idea of how many species will die out from our carbon output

  • Allen Ross
    Allen Ross 26 дней назад

    Watching your analogy of spacetime as two lines (space and time), I could not stop thinking about 3D chess. Shouldn't there be a third arrow?

  • Leia Sadi
    Leia Sadi 27 дней назад

    Hello! What else would I like to lnow about life on Earth? Mudskippers and walking whales.

  • Leia Sadi
    Leia Sadi 27 дней назад +2

    Awesome show! Thank you!

  • Pixx
    Pixx 27 дней назад

    You'd think that the comments on a video like this would be reasonably insightful, or at least polite. They're not.

  • Dady V Master
    Dady V Master 27 дней назад

    So global warming is going to make the earth like what you talking about in the video if that is the case then I could go swimming around Antarctica probably not in my lifetime

  • Paul R
    Paul R 27 дней назад

    "In fewer than 20,000 years". Saying it quickly doesn't make it quick

  • poponachtschnecke
    poponachtschnecke 27 дней назад

    Omg it's Hank!

  • Xon Dominique
    Xon Dominique 28 дней назад

    what do you mean by "... led to the extinction of the non-avian dinosaurs"?! do you imply the avian dinosaurs did not go extinct?!

  • Josey A R
    Josey A R 28 дней назад

    Yes, I understand what this super smart, intelligent, man with many degrees is saying. It all started in Scandinavia when a smart, intelligent dude invented the thermometer.

  • After Effect
    After Effect 28 дней назад

    You said it. We would not be here if not for massive global warming.

    ROBERT ANDERSON 28 дней назад +6

    I am happy that we are still coming out of the Ice Age. I cannot wait for the warming... Still waiting... Oh, that's right, we are in a decades-long "pause" in the warming trend. Humanity has flourished since the warming trend began around 12,000 years ago. I can't wait to see how much better it will become as this warming cycle nears it's end. By the way, whatever happened to the Ozone Hole? (I guess that fixed itself too). Go figure... MAGA Cheap Oil

    • No one lives here
      No one lives here 24 дня назад +6

      The ozone hole is healing itself because we stopped using the things that caused it.

  • retsaM innavoiG
    retsaM innavoiG 28 дней назад +1

    I think one factor people seem to miss is deforestation and the regrowth that occurs.
    e.g. if there is abundant co2 for plant life, it doesn’t necessarily mean more plant life will grow. If a rainforest is well established with century old canopies, than new trees aren’t really going to be growing (the forest will have huge stores of co2 but won’t actually be using a huge amount of co2 regularly). If you tore that rainforest down but than let it grow for the next 100 years it will likely consume a much greater level of co2.
    The crops we grow, the grass on our lawns, paddocks for livestock actually take co2 out of the atmosphere.
    Other than replacing the forests with a concrete jungle, I think it would be an interesting research topic.

  • Wes Phelan
    Wes Phelan 29 дней назад

    I was a climate change doubter until I heard a lecture by Dan Britt. But what remains a problem is the politics of climate change. Too many people use it to promote their power and influence. If they really cared about climate change, they would attack China and India who are worse threats than the US.

    • mako88sb
      mako88sb 26 дней назад

      +Memphis Stef That will change as more of them become middle class. Probably not to the same degree as us per capita because they will have access to lower energy use products right away but the overall impact will still be much more than us.

    • R M
      R M 27 дней назад

      Wes Phelan. I’m glad you now understand that global warming is real.
      You are right that China and India don’t care about it. Still, their emission of CO2 per capital is lower than US, but increasing.
      Europe is the champion fighting this problem.

    • Memphis Stef
      Memphis Stef 29 дней назад

      China and India's, emmisions per capita* is much less tho

  • Yogi Nick
    Yogi Nick 29 дней назад

    So global warming started primates and it will likely end them as well.

  • wade5941
    wade5941 Месяц назад

    I have always found it interesting that the explosion of life occurred during the Cambrian period. CO2 Levels of approx. 5000 and temperatures much higher than today. We are living in a time when CO2 and temperatures are near the lowest levels over the last billion years. Doesn't prove anything, but life does find a way. We have to remember that most of the climate predictions for the future are based on climate computer models that can not be scientifically validated. I agree that managing our outputs (CO2/other) is the responsible thing to do, but there is not evidence that current CO2 levels are a bad thing. There is evidence that higher CO2 and temp levels are beneficial for plant growth. I guess that is why greenhouse operators pump up the CO2 level to 1500 ppm. Not a healthy level for you and I though, so there are limits. There is much to learn.

  • Rich Plewa
    Rich Plewa Месяц назад +5

    Interesting that they never take what is happening on the Sun during those periods. Without the Sun there would be no climate change. Sun Spots have a drastic effect on the climate .

  • Daniel Gebert
    Daniel Gebert Месяц назад

    What are the largest contributors to carbon output today? If you separated them out and ranked them.

    • wade5941
      wade5941 Месяц назад

      The data is all over the board. When someone tells you the science is settled remain skeptical. Attached a CO2 history for information.