---
title: "34 Greenhouse Effect Quotes by 28 authors"
description: "Browse 34 Greenhouse Effect quotes by 28 authors. Discover the best Greenhouse Effect sayings and thoughts."
image: "https://sms4smile.com/quotes/i/ec2/anonymous-1_end-of-summer_thanks-to-the-catastrophic-greenhouse-ef_1453070.jpg"
---

> [Thanks to the catastrophic greenhouse effect, Labor Day no longer signifies the end of summer.](https://sms4smile.com/quotes/anonymous/thanks-to-the-catastrophic-greenhouse-effect-labor-day-no-longer/)

[Anonymous](https://sms4smile.com/quotes/author/anonymous/)

[Image](https://sms4smile.com/quotes/i/ec2/anonymous-1_end-of-summer_thanks-to-the-catastrophic-greenhouse-ef_1453070.jpg)

> [The planetary machinery tends to be jumpy, this is to respond disproportionately to disruptions that come with the manmade greenhouse effect.](https://sms4smile.com/quotes/hans-joachim-schellnhuber/the-planetary-machinery-tends-to-be-jumpy-this-is-to-respond/)

[Hans Joachim Schellnhuber](https://sms4smile.com/quotes/author/hans-joachim-schellnhuber/)

[Image](https://sms4smile.com/quotes/i/1ba/hans-joachim-schellnhuber-4057_climate-change_the-planetary-machinery-tends-to-be-jump_2152660.png)

> [The greenhouse effect is something you can observe experimentally - and most people have observed the greenhouse effect themselves, in greenhouses. Yes?](https://sms4smile.com/quotes/nicholas-stern/the-greenhouse-effect-is-something-you-can-observe-experimentally-and/)

[Nicholas Stern](https://sms4smile.com/quotes/author/nicholas-stern/)

[Image](https://sms4smile.com/quotes/i/c46/nicholas-stern-14654_climate_the-greenhouse-effect-is-something-you-c_2895421.png)

> [It's a morbid observation, but if every one on earth just stopped breathing for an hour, the greenhouse effect would no longer…](https://sms4smile.com/quotes/jerry-adler/it-s-a-morbid-observation-but-if-every-one-on-earth-just-stopped/)

[Jerry Adler](https://sms4smile.com/quotes/author/jerry-adler/)

[Image](https://sms4smile.com/quotes/i/6ea/jerry-adler-67546_breathing_it-s-a-morbid-observation-but-if-every-o_3216058.jpg)

> [You could engineer a human to survive the greenhouse effect because you think that's what's going to happen, and then all of…](https://sms4smile.com/quotes/paul-di-filippo/you-could-engineer-a-human-to-survive-the-greenhouse-effect-because/)

[Paul Di Filippo](https://sms4smile.com/quotes/author/paul-di-filippo/)

[Image](https://sms4smile.com/quotes/i/e80/paul-di-filippo-9923_because_you-could-engineer-a-human-to-survive-th_752467.jpg)

> [If the greenhouse effect is a blanket in which we wrap ourselves to keep warm, nuclear winter kicks the blanket off.](https://sms4smile.com/quotes/carl-sagan/if-the-greenhouse-effect-is-a-blanket-in-which-we-wrap-ourselves-to/)

[Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/)

[Image](https://sms4smile.com/quotes/i/bcd/carl-sagan-160_blanket_if-the-greenhouse-effect-is-a-blanket-in_2996284.jpg)

> [You see, the Greenhouse Effect is a direct result of burning fossil or old carbon fuels.](https://sms4smile.com/quotes/jack-herer/you-see-the-greenhouse-effect-is-a-direct-result-of-burning-fossil-or/)

[Jack Herer](https://sms4smile.com/quotes/author/jack-herer/)

[Image](https://sms4smile.com/quotes/i/194/jack-herer-26906_burning_you-see-the-greenhouse-effect-is-a-direc_2170993.jpg)

> [Nuclear energy people perceive the greenhouse effect as a fresh wind blowing at their back.](https://sms4smile.com/quotes/stewart-udall/nuclear-energy-people-perceive-the-greenhouse-effect-as-a-fresh-wind/)

[Stewart Udall](https://sms4smile.com/quotes/author/stewart-udall/)

[Image](https://sms4smile.com/quotes/i/418/stewart-udall-12055_climate_nuclear-energy-people-perceive-the-green_3062970.png)

> [Something bad happened on both Mars with its dried-up watercourses and Venus with its runaway greenhouse effect. Could something bad happen on…](https://sms4smile.com/quotes/neil-degrasse-tyson/something-bad-happened-on-both-mars-with-its-dried-up-watercourses/)

[Neil deGrasse Tyson](https://sms4smile.com/quotes/author/neil-degrasse-tyson/)

[Image](https://sms4smile.com/quotes/i/421/neil-degrasse-tyson-143_consequence_something-bad-happened-on-both-mars-with_2620702.png)

> [If Earth ever suffers a runaway greenhouse effect (like what has happened on Venus), then our atmosphere would trap excess amounts of…](https://sms4smile.com/quotes/neil-degrasse-tyson/if-earth-ever-suffers-a-runaway-greenhouse-effect-like-what-has/)

[Neil deGrasse Tyson](https://sms4smile.com/quotes/author/neil-degrasse-tyson/)

[Image](https://sms4smile.com/quotes/i/93a/neil-degrasse-tyson-143_air_if-earth-ever-suffers-a-runaway-greenhou_436187.png)

> [...it is quite obvious that the temperature change during the last 100 years or so includes significant natural changes, both the linear…](https://sms4smile.com/quotes/syun-ichi-akasofu/it-is-quite-obvious-that-the-temperature-change-during-the-last-100/)

[Syun-Ichi Akasofu](https://sms4smile.com/quotes/author/syun-ichi-akasofu/)

[Image](https://sms4smile.com/quotes/i/04c/syun-ichi-akasofu-82120_change_it-is-quite-obvious-that-the-temperature_2569912.jpg)

> [The basic scientific conclusions on climate change are very robust and for good reason. The greenhouse effect is simple science: greenhouse gases…](https://sms4smile.com/quotes/nicholas-stern/the-basic-scientific-conclusions-on-climate-change-are-very-robust/)

[Nicholas Stern](https://sms4smile.com/quotes/author/nicholas-stern/)

[Image](https://sms4smile.com/quotes/i/c79/nicholas-stern-14654_change_the-basic-scientific-conclusions-on-clim_418946.jpg)

> [There is a natural greenhouse effect that contributes to warming. Greenhouse gases trap heat and thus warm the Earth because they prevent…](https://sms4smile.com/quotes/george-w-bush/there-is-a-natural-greenhouse-effect-that-contributes-to-warming-2/)

[George W. Bush](https://sms4smile.com/quotes/author/george-w-bush/)

[Image](https://sms4smile.com/quotes/i/6da/george-w-bush-64_climate-change_there-is-a-natural-greenhouse-effect-tha_1846123.jpg)

> [... The reality is that atmospheric CO2 has a minimal impact on greenhouse gases and world temperature. Water vapor is responsible for…](https://sms4smile.com/quotes/walter-cunningham/the-reality-is-that-atmospheric-co2-has-a-minimal-impact-on/)

[Walter Cunningham](https://sms4smile.com/quotes/author/walter-cunningham/)

[Image](https://sms4smile.com/quotes/i/f19/walter-cunningham-39656_activity_the-reality-is-that-atmospheric-co2-has_1946248.jpg)

> [Venus has a runaway greenhouse effect. I kind of want to know what happened there because we're twirling knobs here on Earth…](https://sms4smile.com/quotes/neil-degrasse-tyson/venus-has-a-runaway-greenhouse-effect-i-kind-of-want-to-know-what/)

[Neil deGrasse Tyson](https://sms4smile.com/quotes/author/neil-degrasse-tyson/)

[Image](https://sms4smile.com/quotes/i/3b3/neil-degrasse-tyson-143_bad_venus-has-a-runaway-greenhouse-effect-i_220041.png)

> [The greenhouse effect of carbon-dioxide emissions does produce gentle warming if it is not counteracted by unpredictable natural phenomena, but it cannot…](https://sms4smile.com/quotes/conrad-black/the-greenhouse-effect-of-carbon-dioxide-emissions-does-produce-gentle/)

[Conrad Black](https://sms4smile.com/quotes/author/conrad-black/)

[Image](https://sms4smile.com/quotes/i/4ca/conrad-black-11016_cannot_the-greenhouse-effect-of-carbon-dioxide_2029803.png)

> [Isn't it sad that you can tell people that the ozone layer is being depleted, the forests are being cut down, the…](https://sms4smile.com/quotes/isaac-asimov/isn-t-it-sad-that-you-can-tell-people-that-the-ozone-layer-is-being/)

[Isaac Asimov](https://sms4smile.com/quotes/author/isaac-asimov/)

[Image](https://sms4smile.com/quotes/i/f6f/isaac-asimov-309_choke_isn-t-it-sad-that-you-can-tell-people-th_1689286.jpg)

> [I am not a climatologist, but I don't think any of the other witnesses are either. I do work in the related…](https://sms4smile.com/quotes/william-happer/i-am-not-a-climatologist-but-i-don-t-think-any-of-the-other-witnesses/)

[William Happer](https://sms4smile.com/quotes/author/william-happer/)

[Image](https://sms4smile.com/quotes/i/117/william-happer-64206_behinds_i-am-not-a-climatologist-but-i-don-t-thi_919165.jpg)

> [“Regardless of where they strike, large asteroids would boil seas, fill the air with dust and acidic compounds, and perhaps induce carbon…](https://sms4smile.com/quotes/bill-nye/regardless-of-where-they-strike-large-asteroids-would-boil-seas-fill/)

[Bill Nye](https://sms4smile.com/quotes/author/bill-nye/)

[Image](https://sms4smile.com/quotes/i/e6a/bill-nye-1613_around-the-world_regardless-of-where-they-strike-large-as_1560250.jpg)

> [“Venus is kept that way by a thick, dense atmosphere that’s full of carbon dioxide. It’s the greenhouse effect gone wild—runaway, as…](https://sms4smile.com/quotes/bill-nye/venus-is-kept-that-way-by-a-thick-dense-atmosphere-that-s-full-of/)

[Bill Nye](https://sms4smile.com/quotes/author/bill-nye/)

[Image](https://sms4smile.com/quotes/i/64a/bill-nye-1613_carbon-dioxide_venus-is-kept-that-way-by-a-thick-dense_1304352.png)

> [The gradual depletion of the ozone layer and the related "greenhouse effect" has now reached crisis proportions as a consequence of industrial…](https://sms4smile.com/quotes/pope-john-paul-ii/the-gradual-depletion-of-the-ozone-layer-and-the-related-greenhouse/)

[Pope John Paul II](https://sms4smile.com/quotes/author/pope-john-paul-ii/)

[Image](https://sms4smile.com/quotes/i/c62/pope-john-paul-ii-485_atmosphere_the-gradual-depletion-of-the-ozone-layer_858754.jpg)

> [... the consensus of the scientific community has shifted from skepticism to near-unanimous acceptance of the evidence of an artificial greenhouse effect.…](https://sms4smile.com/quotes/gregg-easterbrook/the-consensus-of-the-scientific-community-has-shifted-from-skepticism/)

[Gregg Easterbrook](https://sms4smile.com/quotes/author/gregg-easterbrook/)

[Image](https://sms4smile.com/quotes/i/d5e/gregg-easterbrook-16327_acceptance_the-consensus-of-the-scientific-communit_1342239.jpg)

> [The general public doesn't know and probably doesn't care about punctuated equilibria nor indeed should they, or the greenhouse effect on some…](https://sms4smile.com/quotes/richard-lewontin/the-general-public-doesn-t-know-and-probably-doesn-t-care-about/)

[Richard Lewontin](https://sms4smile.com/quotes/author/richard-lewontin/)

[Image](https://sms4smile.com/quotes/i/62c/richard-lewontin-20755_ability_the-general-public-doesn-t-know-and-prob_2016445.png)

> [The unthinkable is that we're distorting this atmospheric balance. We're shifting the chemical balance so that we have more poisons in the…](https://sms4smile.com/quotes/michael-oppenheimer/the-unthinkable-is-that-we-re-distorting-this-atmospheric-balance-we/)

[Michael Oppenheimer](https://sms4smile.com/quotes/author/michael-oppenheimer/)

[Image](https://sms4smile.com/quotes/i/bb9/michael-oppenheimer-53864_acid_the-unthinkable-is-that-we-re-distorting_1648798.jpg)

> [“When the Earth was only about a third of its eventual size, it was probably already beginning to form an atmosphere, mostly…](https://sms4smile.com/quotes/bill-bryson/when-the-earth-was-only-about-a-third-of-its-eventual-size-it-was/)

[Bill Bryson](https://sms4smile.com/quotes/author/bill-bryson/)

[Image](https://sms4smile.com/quotes/i/f0f/bill-bryson-340_carbon-dioxide_when-the-earth-was-only-about-a-third-of_2393774.png)

> [“And when the ocean starts rising to the level of whatever building they're in and whatever floor they're on as they write…](https://sms4smile.com/quotes/noam-chomsky/and-when-the-ocean-starts-rising-to-the-level-of-whatever-building/)

[Noam Chomsky](https://sms4smile.com/quotes/author/noam-chomsky/)

[Image](https://sms4smile.com/quotes/i/b0a/noam-chomsky-42_capitalism_and-when-the-ocean-starts-rising-to-the_801742.jpg)

> [“The principal energy sources of our present industrial civilization are the so-called fossil fuels. We burn wood and oil, coal and natural…](https://sms4smile.com/quotes/carl-sagan/the-principal-energy-sources-of-our-present-industrial-civilization/)

[Carl Sagan](https://sms4smile.com/quotes/author/carl-sagan/)

[Image](https://sms4smile.com/quotes/i/da3/carl-sagan-160_blue-planet_the-principal-energy-sources-of-our-pres_1126507.jpg)

> [“The greenhouse effect I am knowing; To protest right now I am going, But oh my gee whiz, I'm going that is,…](https://sms4smile.com/quotes/alan-cook/the-greenhouse-effect-i-am-knowing-to-protest-right-now-i-am-going/)

[Alan Cook](https://sms4smile.com/quotes/author/alan-cook/)

[Image](https://sms4smile.com/quotes/i/f0d/alan-cook-107991_flower_the-greenhouse-effect-i-am-knowing-to-pr_216850.jpg)

> [“An image suddenly loomed in his mind: the greenhouse effect. Yes. The Earth is a gigantic greenhouse. With us planted here millions…](https://sms4smile.com/quotes/john-ajvide-lindqvist/an-image-suddenly-loomed-in-his-mind-the-greenhouse-effect-yes-the/)

[John Ajvide Lindqvist](https://sms4smile.com/quotes/author/john-ajvide-lindqvist/)

[Image](https://sms4smile.com/quotes/i/b47/john-ajvide-lindqvist-10781_aliens_an-image-suddenly-loomed-in-his-mind-the_823150.png)

> [Given that, and assuming that we begin to adjust to issues like climate change and the greenhouse effect, Denver's location in the…](https://sms4smile.com/quotes/john-hickenlooper/given-that-and-assuming-that-we-begin-to-adjust-to-issues-like/)

[John Hickenlooper](https://sms4smile.com/quotes/author/john-hickenlooper/)

[Image](https://sms4smile.com/quotes/i/b6b/john-hickenlooper-2400_adjust_given-that-and-assuming-that-we-begin-to_985274.png)

> [ Because nitrous oxide \[released by nitrate-fertilised soil\] is 296 times stronger than COâ‚‚ at global warming and methane \[cow farts\] is about… ](https://sms4smile.com/quotes/thom-hartmann/because-nitrous-oxide-released-by-nitrate-fertilised-soil-is-296/)

[Thom Hartmann](https://sms4smile.com/quotes/author/thom-hartmann/)

[Image](https://sms4smile.com/quotes/i/143/thom-hartmann-13946_airplane_because-nitrous-oxide-released-by-nitrat_602219.png)

> [There is a natural greenhouse effect that contributes to warming. Greenhouse gases trap heat and thus warm the Earth because they prevent…](https://sms4smile.com/quotes/george-w-bush/there-is-a-natural-greenhouse-effect-that-contributes-to-warming/)

[George W. Bush](https://sms4smile.com/quotes/author/george-w-bush/)

[Image](https://sms4smile.com/quotes/i/84a/george-w-bush-64_climate-change_there-is-a-natural-greenhouse-effect-tha_1293798.jpg)

> [Al Gore likes to say that mankind puts 70 million tons of carbon dioxide into the atmosphere every day. What he probably…](https://sms4smile.com/quotes/roy-spencer/al-gore-likes-to-say-that-mankind-puts-70-million-tons-of-carbon/)

[Roy Spencer](https://sms4smile.com/quotes/author/roy-spencer/)

[Image](https://sms4smile.com/quotes/i/8a9/roy-spencer-30236_als_al-gore-likes-to-say-that-mankind-puts-7_1171717.jpg)

> [“I would like to draw three main conclusions. Number one, the earth is warmer in 1988 than at any time in the…](https://sms4smile.com/quotes/bill-mckibben/i-would-like-to-draw-three-main-conclusions-number-one-the-earth-is/)

[Bill McKibben](https://sms4smile.com/quotes/author/bill-mckibben/)

[Image](https://sms4smile.com/quotes/i/9a2/bill-mckibben-1057_cause-and-effect_i-would-like-to-draw-three-main-conclusi_250804.jpg)

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                        "text": "If the greenhouse effect is a blanket in which we wrap ourselves to keep warm, nuclear winter kicks the blanket off.",
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                        "text": "Something bad happened on both Mars with its dried-up watercourses and Venus with its runaway greenhouse effect. Could something bad happen on Earth too? Our species currently turns row upon row of environmental knobs, without much regard to long-term consequences.",
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                        "text": "If Earth ever suffers a runaway greenhouse effect (like what has happened on Venus), then our atmosphere would trap excess amounts of solar energy, the air temperature would rise, and the oceans would swiftly evaporate into the atmosphere as they sustained a rolling boil. This would be bad.",
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                        "text": "...it is quite obvious that the temperature change during the last 100 years or so includes significant natural changes, both the linear change and fluctuations. It is very puzzling that the IPCC reports state that it is mostly due to the greenhouse effect.",
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                        "text": "The basic scientific conclusions on climate change are very robust and for good reason. The greenhouse effect is simple science: greenhouse gases trap heat, and humans are emitting ever more greenhouse gases.",
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                        "text": "There is a natural greenhouse effect that contributes to warming. Greenhouse gases trap heat and thus warm the Earth because they prevent a significant proportion of infrared radiation from escaping into space.",
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                        "text": "... The reality is that atmospheric CO2 has a minimal impact on greenhouse gases and world temperature. Water vapor is responsible for 95 percent of the greenhouse effect. CO2 contributes just 3.6 percent, with human activity responsible for only 3.2 percent of that. That is why some studies claim CO2 levels are largely irrelevant to global warming.",
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                        "text": "Venus has a runaway greenhouse effect. I kind of want to know what happened there because we're twirling knobs here on Earth without knowing the consequences of it. Mars once had running water. It's bone dry today. Something bad happened there as well.",
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                        "text": "The greenhouse effect of carbon-dioxide emissions does produce gentle warming if it is not counteracted by unpredictable natural phenomena, but it cannot be measured directly against the volume of such emissions.",
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                        "text": "Isn't it sad that you can tell people that the ozone layer is being depleted, the forests are being cut down, the deserts are advancing steadily, that the greenhouse effect will raise the sea level 200 feet, that overpopulation is choking us, that pollution is killing us, that nuclear war may destroy us - and they yawn and settle back for a comfortable nap. But tell them that the Martians are landing, and they scream and run.",
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                        "text": "I am not a climatologist, but I don't think any of the other witnesses are either. I do work in the related field of atomic, molecular and optical physics. I have spent my professional life studying the interactions of visible and infrared radiation with gases - one of the main physical phenomena behind the greenhouse effect. I have published over 200 papers in peer reviewed scientific journals.",
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                        "text": "“Regardless of where they strike, large asteroids would boil seas, fill the air with dust and acidic compounds, and perhaps induce carbon dioxide to cook off out of the rocks and into the air, triggering a strong greenhouse effect, all of which in turn would change the world’s climate faster than living things could adjust to. Giant impactors could create enormous waves in the ocean and in the atmosphere that could upset weather patterns around the world for extended periods. Perhaps asteroids have also helped unleash Earth’s internal heat and caused subsequent volcanism.”",
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                        "text": "“Venus is kept that way by a thick, dense atmosphere that’s full of carbon dioxide. It’s the greenhouse effect gone wild—runaway, as it is oft described. In fact, the models of climate change here on Earth were developed in part by scientists, James Hansen especially, who were studying the atmosphere of Venus. They observed that visible light passes the atmosphere, hits the surface, and then is reradiated as heat that is then trapped by carbon dioxide. This process has a big influence on whether or not a planet is habitable.”",
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                        "text": "The gradual depletion of the ozone layer and the related \"greenhouse effect\" has now reached crisis proportions as a consequence of industrial growth, massive urban concentrations and vastly increased energy needs. Industrial waste, the burning of fossil fuels, unrestricted deforestation, the use of certain types of herbicides, coolants and propellants: all of these are known to harm the atmosphere and environment.",
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                        "text": "... the consensus of the scientific community has shifted from skepticism to near-unanimous acceptance of the evidence of an artificial greenhouse effect. Second, while artificial climate change may have some beneficial effects, the odds are we're not going to like it. Third, reducing emissions of greenhouse gases may turn out to be much more practical and affordable than currently assumed.",
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                        "text": "The general public doesn't know and probably doesn't care about punctuated equilibria nor indeed should they, or the greenhouse effect on some other planet - they barely have the ability to cope with the greenhouse effect on their own planet. So I think you have to distinguish between the broad visibility of a scientist when he or she is speaking to a general public and trying to address general issues and the continued position that a scientist may have into the history of a particular subject.",
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                            "@type": "Person",
                            "name": "Richard Lewontin"
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                            "caption": "“The general public doesn't know and probably doesn't care about punctuated equilibria nor indeed should…” — Richard Lewontin",
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                        "text": "The unthinkable is that we're distorting this atmospheric balance. We're shifting the chemical balance so that we have more poisons in the atmosphere - ozones and acid rain on ground level - while we're also changing the thermal climate of the earth through the greenhouse effect and - get this - simultaneously causing destruction of our primary filter of ultraviolet light. It's incredible. Talk about the national-debt crisis - we're piling up debts in the atmosphere, and the piper will want to be paid.",
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                            "name": "Michael Oppenheimer"
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                        "text": "“When the Earth was only about a third of its eventual size, it was probably already beginning to form an atmosphere, mostly of carbon dioxide, nitrogen, methane and sulphur. Hardly the sort of stuff that we would associate with life, and yet from this noxious stew life formed. Carbon dioxide is a powerful greenhouse gas. This was a good thing, because the Sun was significantly dimmer back then. Had we not had the benefit of a greenhouse effect, the Earth might well have frozen over permanently25, and life might never have got a toehold. But somehow life did. For the next 500 million years the young Earth continued to be pelted relentlessly by comets, meteorites and other galactic debris, which brought water to fill the oceans and the components necessary for the successful formation of life. It was a singularly hostile environment, and yet somehow life got going. Some tiny bag of chemicals twitched and became animate. We were on our way. Four billion years later, people began to wonder how it had all happened.”",
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                        "text": "“And when the ocean starts rising to the level of whatever building they're in and whatever floor they're on as they write their editorials, yeah, then they'll agree that there's a greenhouse effect and we'd better do something about it. Sure, no matter how lunatic people are, at some point or other they're going to realize that these problems exist, and they are approaching fast. It's just that the next thing they'll ask is, \"So how can we make some money off it?\" In fact, anybody in business who didn't ask that question would find themselves out of business—just because that's the way that capitalist institutions work. I mean, if some executive came along and said,\" I'm not going to look at it that way, I'm going to do things differently,\" well, they'd get replaced by someone who would try to make more money off it―because these are simply institutional facts, these are facts about the structure of the institutions. And if you don't like them, and I don't, then you're going to have to change the institutions. There really is no other way.”",
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                        "text": "“The principal energy sources of our present industrial civilization are the so-called fossil fuels. We burn wood and oil, coal and natural gas, and, in the process, release waste gases, principally CO2, into the air. Consequently, the carbon dioxide content of the Earth’s atmosphere is increasing dramatically. The possibility of a runaway greenhouse effect suggests that we have to be careful: Even a one- or two-degree rise in the global temperature can have catastrophic consequences. In the burning of coal and oil and gasoline, we are also putting sulfuric acid into the atmosphere. Like Venus, our stratosphere even now has a substantial mist of tiny sulfuric acid droplets. Our major cities are polluted with noxious molecules. We do not understand the long-term effects of our course of action. But we have also been perturbing the climate in the opposite sense. For hundreds of thousands of years human beings have been burning and cutting down forests and encouraging domestic animals to graze on and destroy grasslands. Slash-and-burn agriculture, industrial tropical deforestation and overgrazing are rampant today. But forests are darker than grasslands, and grasslands are darker than deserts. As a consequence, the amount of sunlight that is absorbed by the ground has been declining, and by changes in the land use we are lowering the surface temperature of our planet. Might this cooling increase the size of the polar ice cap, which, because it is bright, will reflect still more sunlight from the Earth, further cooling the planet, driving a runaway albedo* effect? Our lovely blue planet, the Earth, is the only home we know. Venus is too hot. Mars is too cold. But the Earth is just right, a heaven for humans. After all, we evolved here. But our congenial climate may be unstable. We are perturbing our poor planet in serious and contradictory ways. Is there any danger of driving the environment of the Earth toward the planetary Hell of Venus or the global ice age of Mars? The simple answer is that nobody knows. The study of the global climate, the comparison of the Earth with other worlds, are subjects in their earliest stages of development. They are fields that are poorly and grudgingly funded. In our ignorance, we continue to push and pull, to pollute the atmosphere and brighten the land, oblivious of the fact that the long-term consequences are largely unknown.”",
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                            "name": "Carl Sagan"
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                            "caption": "“The principal energy sources of our present industrial civilization are the so-called fossil fuels. We burn…” — Carl Sagan",
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                        "@type": "Quotation",
                        "text": "“The greenhouse effect I am knowing; To protest right now I am going, But oh my gee whiz, I'm going that is, If only it ever stops snowing.”",
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                            "name": "Alan Cook"
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                            "caption": "“The greenhouse effect I am knowing; To protest right now I am going, But oh my gee whiz, I'm going that is…” — Alan Cook",
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                        "@type": "Quotation",
                        "text": "“An image suddenly loomed in his mind: the greenhouse effect. Yes. The Earth is a gigantic greenhouse. With us planted here millions of years ago by aliens. Soon they’ll be back for the harvest.”",
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                            "name": "John Ajvide Lindqvist"
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                            "caption": "“An image suddenly loomed in his mind: the greenhouse effect. Yes. The Earth is a gigantic greenhouse. With…” — John Ajvide Lindqvist",
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                        "@type": "Quotation",
                        "text": "Given that, and assuming that we begin to adjust to issues like climate change and the greenhouse effect, Denver's location in the center of the country becomes a tremendous advantage.",
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                            "name": "John Hickenlooper"
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                            "caption": "“Given that, and assuming that we begin to adjust to issues like climate change and the greenhouse effect…” — John Hickenlooper",
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                        "text": "Because nitrous oxide [released by nitrate-fertilised soil] is 296 times stronger than COâ‚‚ at global warming and methane [cow farts] is about 26 times as potent as COâ‚‚, the combined greenhouse effect of our livestock worldwide is greater than the sum total of all the cars, trains, busses, trucks, ships, airplanes and jets.",
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                            "caption": "“Because nitrous oxide [released by nitrate-fertilised soil] is 296 times stronger than COâ‚‚ at global…” — Thom Hartmann",
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                        "@type": "Quotation",
                        "text": "There is a natural greenhouse effect that contributes to warming. Greenhouse gases trap heat and thus warm the Earth because they prevent a significant portion of infrared radiation from escaping into space.",
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                            "name": "George W. Bush"
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                        "text": "Al Gore likes to say that mankind puts 70 million tons of carbon dioxide into the atmosphere every day. What he probably doesn't know is that mother nature puts 24,000 times that amount of our main greenhouse gas-water vapor-into the atmosphere every day and removes about the same amount every day. While this does not 'prove' that global warming is not man-made, it shows that weather systems have by far the greatest control over the Earth's greenhouse effect, which is dominated by water vapor and clouds.",
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                        "text": "“I would like to draw three main conclusions. Number one, the earth is warmer in 1988 than at any time in the history of instrumental measurements. Number two, the global warming is now large enough that we can ascribe with a high degree of confidence a cause and effect relationship to the greenhouse effect. And number three, our computer climate simulations indicate that the greenhouse effect is already large enough to begin to effect the probability of extreme events such as summer heat waves.”",
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