In 1965, LBJ was warned about global warming.

[raccoon]

1965
U.S. President Lyndon Johnson's Science Advisory Committee issues report on global warming

The President's statement was made public as part of a White House release summarizing highlights of the report. The release stated that a panel of 14 outstanding physicians, scientists, and engineers, chaired by John W. Tukey of Princeton University and Bell Telephone Laboratories, and assisted by 11 subpanels, had spent 15 months in preparation of the report.

Significant findings of the Committee, the release noted, include the following:

Pollution is an inevitable consequence of an advanced society, but we need not suffer from the intensity and extent of pollution we now see around us. If we are to manage our pollution as we should, we must give more nearly the same attention to how we dispose of our waste materials as to how we gather and transform our raw materials. Society must take the position that no citizen, no industry, no municipality has the right to pollute.

Carbon dioxide is being added to the earth's atmosphere by the burning of coal, oil, and natural gas at the rate of 6 billion tons a year. By the year 2000 there will be about 25 percent more carbon dioxide in our atmosphere than at present. Exhausts and other releases from automobiles contribute a major share to the generation of smog.

Shallow waters of our coasts and estuaries are essential in the life cycles of the fish and shellfish that provide nearly 60 percent of our total seafoods. The filling in of these shallow waters must be regarded as an important kind of pollution.

https://worldhistoryproject.org/1965/us-president-lyndon-johnsons-science-advisory-committee-issues-report-on-global-warming

I had no idea of this until I ran across it in a book, GOLDEN HOLOCAUST, about the tobacco industry. No idea that scientists knew about global warming (or, if you will, Climate change) that long ago....Wow...

[Moostache]

1. It's been a LOT longer than that....

Svante Arrhenius (1859-1927) was a Swedish scientist that was the first to claim in 1896 that fossil fuel combustion may eventually result in enhanced global warming. He proposed a relation between atmospheric carbon dioxide concentrations and temperature. He found that the average surface temperature of the earth is about 15oC because of the infrared absorption capacity of water vapor and carbon dioxide. This is called the natural greenhouse effect. Arrhenius suggested a doubling of the CO2 concentration would lead to a 5oC temperature rise.

Read more: https://www.lenntech.com/greenhouse-effect/global-warming-history.htm#ixzz58EKXJEUg

This is NOT a new phenomena or an unknown in any way, shape or form...humanity has known all along that the mass burning of fossil fuels was a suicide pact...just not one for the generations that started the fires. People living today under the age of 30 are going to be the first ones to suffer the true ravages of the wreckage we as a species hath wrought on the Earth. Millions of species are already going to extinction or have already been lost in the era of the Industrial Age...by the time its all over, nearly everything bigger than a cell phone will be gone...

It is not a fight we can win because the fight is not only with political opponents, it is with the very nature of humanity and our capacity for self-delusion and procrastination that has doomed us all.

[Phoenix61]

2. They knew about it way before that

The first paper was in 1896. The science hasn't changed much since then although I'm sure our ability to accurately measure gas levels and temps has gotten much better.

https://history.aip.org/climate/timeline.htm

[procon]

3. And the oil companies also knew about climate change almost 40 years ago.

This knowledge did not prevent the company (now ExxonMobil and the world’s largest oil and gas company) from spending decades refusing to publicly acknowledge climate change and even promoting climate misinformation—an approach many have likened to the lies spread by the tobacco industry regarding the health risks of smoking. Both industries were conscious that their products wouldn’t stay profitable once the world understood the risks, so much so that they used the same consultants to develop strategies on how to communicate with the public.

https://www.scientificamerican.com/article/exxon-knew-about-climate-change-almost-40-years-ago/

They've been lying -- and bribing! -- ever since. Just imagine where we'd be now if we'd listened to President Jimmy Carter back in 1979 when he had solar panels installed at the White House in a campaign to conservative energy and reduce the dependency on fossil fuels.

[shanny]

4. Edward Teller gave a speech in 1959

to the American Petroleum Institute warning them they needed to get into another line of work:

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

They did the research and first buried, then actively denied the results.

[Igel]

5. Your citation just talks of increase in CO2.

The full report is here.

https://babel.hathitrust.org/cgi/pt?id=uc1.b4116127;view=1up;seq=9

I like this site. It has odd things, sometimes. But usually primary sources, not even just contemporaneous summaries of primary sources. (This is, of course, a secondary source.)

The following page references are relevant here:

https://babel.hathitrust.org/cgi/pt?id=uc1.b4116127;view=1up;seq=46

https://babel.hathitrust.org/cgi/pt?id=uc1.b4116127;view=1up;seq=143

https://babel.hathitrust.org/cgi/pt?id=uc1.b4116127;view=1up;seq=142

https://babel.hathitrust.org/cgi/pt?id=uc1.b4116127;view=1up;seq=133

Most speak of possibilities and contingencies, predictions. "This should happen" is rather different from "this has happened"; "this is one part of the picture" allows for numerous other parts to be introduced to offset or mitigate or just obfuscate.

The report is not as clear as we'd like to think it was, except in hindsight; culpability, however great we'd like to make it, is thereby diminished.

[NickB79]

6. There was a video made about it in 1958