Ken Kern quote: “Pit Greenhouses… greenhouse plants… need additional sources of carbon dioxide.”

“The greenhouse effect is a more apt name than those who coined it imagined. The carbon dioxide and trace gases act like the panes of glass on a greenhouse—the analogy is accurate. But it's more than that. We have built a greenhouse, 'a human creation' where once there bloomed a sweet and wild garden.”

Bill McKibben book The End of Nature

Source: The End of Nature (1989), p. 78

“Those who are skeptical about carbon dioxide greenhouse warming might profitably note the massive greenhouse effect on Venus. No one proposes that Venus's greenhouse effect derives from imprudent Venusians who burned too much coal, drove fuel-inefficient autos, and cut down their forests. My point is different. The climatological history of our planetary neighbor, an otherwise Earthlike planet on which the surface became hot enough to melt tin or lead, is worth considering — especially by those who say that the increasing greenhouse effect on Earth will be self-correcting, that we don't really have to worry about it, or (you can see this in the publications of some groups that call themselves conservative) that the greenhouse effect is a "hoax."”

Carl Sagan book Pale Blue Dot

Source: Pale Blue Dot: A Vision of the Human Future in Space (1994), p. 227

“Carbon dioxide, Mister Speaker, is a natural byproduct of nature. Carbon dioxide is natural. It occurs in Earth. It is a part of the regular lifecycle of Earth. In fact, life on planet Earth can't even exist without carbon dioxide. So necessary is it to human life, to animal life, to plant life, to the oceans, to the vegetation that's on the Earth, to the, to the fowl that — that flies in the air, we need to have carbon dioxide as part of the fundamental lifecycle of Earth…There isn't one such study because carbon dioxide is not a harmful gas, it is a harmless gas. Carbon dioxide is natural. It is not harmful. It is part of Earth's life cycle…And yet we're being told that we have to reduce this natural substance and reduce the American standard of living to create an arbitrary reduction in something that is naturally occuring in the earth.”

Michele Bachmann (1956) American politician

Stumped By Science: Michele Bachmann Calls CO2 'Harmless,' 'Negligible,' 'Necessary,' 'Natural'
Brad
Johnson
The Wonk Room
Think Progress
2009-04-24
http://wonkroom.thinkprogress.org/2009/04/24/bachmann-harmless-co2/
2011-05-27
2010s

“Who loves a garden loves a greenhouse too.”

William Cowper The Task

Source: The Task (1785), Book III, The Garden, Line 566.

“In fact, the thickness of the Earth's atmosphere, compared with the size of the Earth, is in about the same ratio as the thickness of a coat of shellac on a schoolroom globe is to the diameter of the globe. That's the air that nurtures us and almost all other life on Earth, that protects us from deadly ultraviolet light from the sun, that through the greenhouse effect brings the surface temperature above the freezing point. (Without the greenhouse effect, the entire Earth would plunge below the freezing point of water and we'd all be dead.) Now that atmosphere, so thin and fragile, is under assault by our technology. We are pumping all kinds of stuff into it. You know about the concern that chlorofluorocarbons are depleting the ozone layer; and that carbon dioxide and methane and other greenhouse gases are producing global warming, a steady trend amidst fluctuations produced by volcanic eruptions and other sources. Who knows what other challenges we are posing to this vulnerable layer of air that we haven't been wise enough to foresee?”

Carl Sagan (1934–1996) American astrophysicist, cosmologist, author and science educator

In Wonder and Skepticism, Skeptical Enquirer (Jan-Feb 1995), 19, No. 1.

“Growing hemp as nature designed it is vital to our urgent need to reduce greenhouse gases and ensure the survival of our planet.”

Jack Herer (1939–2010) American Cannabis/Hemp and freedom activist

Attributed to Herer in Blunts' The Quotable Stoner (2011), p. 133.

“Ladies and gentlemen, I am to talk to you about energy in the future. I will start by telling you why I believe that the energy resources of the past must be supplemented. First of all, these energy resources will run short as we use more and more of the fossil fuels. But I would […] like to mention another reason why we probably have to look for additional fuel supplies. And this, strangely, is the question of contaminating the atmosphere. […. ] Whenever you burn conventional fuel, you create carbon dioxide. […. ] The carbon dioxide is invisible, it is transparent, you can’t smell it, it is not dangerous to health, so why should one worry about it?
Carbon dioxide has a strange property. It transmits visible light but it absorbs the infrared radiation which is emitted from the earth. Its presence in the atmosphere causes a greenhouse effect […. ] It has been calculated that a temperature rise corresponding to a 10 per cent increase in carbon dioxide will be sufficient to melt the icecap and submerge New York. All the coastal cities would be covered, and since a considerable percentage of the human race lives in coastal regions, I think that this chemical contamination is more serious than most people tend to believe.”

Edward Teller (1908–2003) Hungarian-American nuclear physicist

As quoted in Benjamin Franta, "On its 100th birthday in 1959, Edward Teller warned the oil industry about global warming" https://www.theguardian.com/environment/climate-consensus-97-per-cent/2018/jan/01/on-its-hundredth-birthday-in-1959-edward-teller-warned-the-oil-industry-about-global-warming, The Guardian, 1 January 2018.

“Carbon dioxide has never entered the atmosphere so fast. In 1976 the carbon dioxide level was at 0.03 percent. We've lived through a change to 0.04 percent.”

Bill Nye (1955) American science educator, comedian, television host, actor, writer, scientist and former mechanical engineer

[NewsBank, 'Science Guy' Visits Volcano, The Chronicle, Centralia, Washington, May 18, 2009, Paula Collucci]

“The danger is that global warming may become self-sustaining, if it has not done so already. The melting of the Arctic and Antarctic ice caps reduces the fraction of solar energy reflected back into space, and so increases the temperature further. Climate change may kill off the Amazon and other rain forests, and so eliminate once one of the main ways in which carbon dioxide is removed from the atmosphere. The rise in sea temperature may trigger the release of large quantities of carbon dioxide, trapped as hydrides on the ocean floor. Both these phenomena would increase the greenhouse effect, and so global warming further. We have to reverse global warming urgently, if we still can.”

Stephen Hawking (1942–2018) British theoretical physicist, cosmologist, and author

ABC News interview (16 August 2006)

“We should remember that the last time global temperature was 5C different from today, the Earth was gripped by an ice age. So the risks are immense and can only be sensibly managed by reducing greenhouse gas emissions, which will require a new low-carbon industrial revolution.”

Nicholas Stern, Baron Stern of Brentford (1946) British economist and academic

"Climate change is here now and it could lead to global conflict" http://www.theguardian.com/environment/2014/feb/13/storms-floods-climate-change-upon-us-lord-stern, The Guardian (14 February 2014).

“Pit Greenhouses… greenhouse plants… need additional sources of carbon dioxide.”

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