@Typo-MAGAshiv

The issues from the 1970s warned about an upcoming ice age. By the 1990s, the same retards were worried about "global warming".

Careful, here. You're repeating uncritically, the retconning propaganda of oil and large industrial interests, with massive profits on the line in convincing the masses that "Environmentalists are full of shit." This superficial summary completely leaves out the REASONS that a manmade ice age was a real threat in the 70s, and that the legitimate threat changed to global warming by the 90s. I will now show that the ACTUAL non-predictive bullshitters all along, are those who claimed that "Environmentalists will bankrupt industries and take away cars and trucks."

During the postwar industrial boom, the population explosion helped drive a massive increase in particulate emissions, along with "invisible" CO2. One effect was worldwide particulate smog that blocked a significant percentage of solar input reaching ground level. Projections of growth of population and industry from 1950s numbers, solidly forecast a long and strong enough change to the very albedo of planet earth, to precipitate a new ice age.

One example you can see right in your NatGeo collection: Historical Ansel Adams photos of the crisp clear splendor of the remote Yosemite Valley. Then photos from the 70s where the same view was obscured for 200+ days a year by particulate emissions from power plants hundreds of miles upwind, then later with many times the population but with emissions equipment mandated into place, the view once again clear for 200+ days a year. Growing up in Los Angeles, in the 70s smog days were so bad that elementary students weren't allowed out into the playground to exercise and increase our respiration rate of the sickening brown soup that obscured the view just across the school's own athletic field.

Particulate filters an NOx scrubbers, are expensive at the individual vehicle level, but scale up very efficiently, to a percentage of production output to emissions capture, in big "smokestack" industries. The last frontier yet unconquered, is capturing the "invisible' CO2 emissions at scale.

Thus, emission reduction mandates that gained traction in the late 60s-70s, got realized in effective installed equipment through the 80s. So, entering the 90s, sun-blocking particulate emissions were on the downswing, while "invisible" CO2 emissions continued scaling upward with fossil fuel burning. Thus comes the positive feedback loop of "Radiative forcing" for which there is a detailed Wiki article. CO2 does not significantly block incoming solar radiation, but it DOES block the reradiation of the different wavelength back out to space. Thus, the "greenhouse effect." The steady increase of particulate blocking of insolation, no longer matches the steady increase of CO2 concentration in the atmosphere.

This is the PHYSICAL MECHANISM by which concern over "impending ice age" in the 70s, got replaced by legitimate concern over "impending global warming."

After receiving much rightful ridicule over the years, they started calling it "climate change".

Actually a direct response to dip shits saying, "Hurr durr, just shoveled 10 inches of Global Warming out of my driveway!" which is a weather not a climate factor.

A specific example of these dumb-fuck appeal memes getting injected into the popular culture. Studies made in the early 90s examined the entire life cycle of using biomass instead of fossil fuel for large scale power generation. Every aspect of the cycle, from fuel burned and CO2 generated during planting, harvest, transport, meticulously accounted for and the net CO2 impact,compared to the impact of the same amount of power generated by fossil fuel inputs. Turns out, renewable biomass is a much lower net producer of CO2, compared to extracting and burning carbon based fossil fuels.

Some crops, notably hemp, were found to result in a net REDUCTION in CO2. In other words, the growth of the plant, absorbed more CO2 out of the atmosphere, than the whole farming, transport, and ultimate burning in a power plant, ultimately released back into the atmosphere. Side note, hemp burns SO hot, that there have been cases of power plants built for other inputs getting damaged when burning large seizures of marijuana crops.

Anyway, I heard when that fat fuck Rush Limbaugh reported this finding, twisted to suit the agenda of the fossil fuel producers who paid for the $800 dollar surrogate penis cigars he loved to get photographed smoking. He said in a voice dripping with contempt and "Stupidest shit ever heard" snideness, "These environmentalist wackos said, that global warming can be stopped... by growing marijuana. Then his out-tro theme sound as he went to commercial. This is a nuts-and-bolts citation, of one exact mechanism of petrochemical industry favoring propaganda, getting delivered to the right wing masses, on the basis of ZERO actual understanding or legitimate critical analysis.

@MentORPHEUS

1) amid the bullshit concerns for "global warming", the polar icecaps increased in size, as did the glaciers being tracked in Greenland, Alaska, Norway, Iceland, Canada, Mt. Kiliminjaro and other large mountains and mountain ranges and various other locations.

2) the impending ice age concerns were bullshit. The smog was a legitimate health concern, but it wasn't going to cause an ice age.

3) ignore what they say, but watch what they do: observe the behaviors of the loudest speakers about CO2 emissions. From Algore to John Kerry to Taylor Swift to AOC to Barack Obama to Bill Gates to Greta Thunberg and other eurotrash: they want us regular plebeians to drive our cars less, use less air conditioning, and use paper straws while they special ruling class emit more CO2 in a single trip in each of their private jets than any one other person does in an entire year of using their car. It's not about any real concern for any real environmental issue: it's about controlling us. "You will own noting, you will repair nothing, you will eat bugs, you will live in pods, and you will be happy!"

3) I had to lol at this line:

that fat fuck Rush Limbaugh

Are you stuck in 1994? Because by 1998, he had become quite thin and maintained it for the rest of his life. RIP legend.