“Scientific fact is under threat,” the tool kit says. “Lawmakers and business leaders are turning a blind eye to the impending environmental crisis caused by human actions. Environmental justice demands an educated citizenry capable of defending science and reason.”

Maybe it’s just us here in the peanut gallery, but “science” is what got us here in the first place. Before science, we were happy cave dwellers who died young and didn’t invent great stuff beyond, say, a dreamcatcher.

“Environmental education is the first step towards progress… to tackle the unprecedented challenge of climate change,” according to earthday.org.

In other words, there is one version of the facts in front of us. Learn it. Recite it. Don’t dare to doubt it.

The scientists — some of them, at least — will be joining in the fray, as the March for Science is also on Saturday (10 am on the Park Strip in Anchorage), a convenient intersection of interests that will most certainly be an anti-Trump, anti-Republican event. Bring on the henna tattoos.

The day, curiously, is also the birthday of Vladimir Lenin. We must bake a cake. That part about one of the first Earth Day activists killing and composting his girlfriend? Wrong. He packed her in Styrofoam pellets. Environmental pig.

One might say that Earth Day has been an unparalleled success. After all, the Earth is a much better place than it was back in the late 1960s, when the nascent environmental movement was predicting our imminent destruction. More people live here. More of them live pretty good lives. There seems to be less starvation in places like India and Africa. Even the Russians and Chinese are better off in 2017.

That’s either inconvenient or something Earth Day can hang its hat on.

Enough already, on to the quiz.

THE QUIZ

Here, then, compiled by American Enterprise Institute’s Mark J. Perry, are 18 predictions about humanity’s demise, as told to us by scientists in 1970.

The quiz is: Which of these predictions came true?

1. Harvard biologist George Wald estimated that “civilization will end within 15 or 30 years unless immediate action is taken against problems facing mankind.”

2. “We are in an environmental crisis which threatens the survival of this nation, and of the world as a suitable place of human habitation,” wrote Washington University biologist Barry Commoner in the Earth Day issue of the scholarly journal Environment.

3. The day after the first Earth Day, the New York Times editorial page warned, “Man must stop pollution and conserve his resources, not merely to enhance existence but to save the race from intolerable deterioration and possible extinction.”

4. “Population will inevitably and completely outstrip whatever small increases in food supplies we make,” Paul Ehrlich confidently declared in the April 1970 issue of Mademoiselle. “The death rate will increase until at least 100-200 million people per year will be starving to death during the next ten years.”

5. “Most of the people who are going to die in the greatest cataclysm in the history of man have already been born,” wrote Paul Ehrlich in a 1969 essay titled “Eco-Catastrophe! “By…[1975] some experts feel that food shortages will have escalated the present level of world hunger and starvation into famines of unbelievable proportions. Other experts, more optimistic, think the ultimate food-population collision will not occur until the decade of the 1980s.”

6. Ehrlich sketched out his most alarmist scenario for the 1970 Earth Day issue of The Progressive, assuring readers that between 1980 and 1989, some 4 billion people, including 65 million Americans, would perish in the “Great Die-Off.”

7. “It is already too late to avoid mass starvation,” declared Denis Hayes, the chief organizer for Earth Day, in the Spring 1970 issue of The Living Wilderness.

8. Peter Gunter, a North Texas State University professor, wrote in 1970, “Demographers agree almost unanimously on the following grim timetable: by 1975 widespread famines will begin in India; these will spread by 1990 to include all of India, Pakistan, China and the Near East, Africa. By the year 2000, or conceivably sooner, South and Central America will exist under famine conditions….By the year 2000, thirty years from now, the entire world, with the exception of Western Europe, North America, and Australia, will be in famine.”

9. In January 1970, Life reported, “Scientists have solid experimental and theoretical evidence to support…the following predictions: In a decade, urban dwellers will have to wear gas masks to survive air pollution…by 1985 air pollution will have reduced the amount of sunlight reaching earth by one half….”

10. Ecologist Kenneth Watt told Time that, “At the present rate of nitrogen buildup, it’s only a matter of time before light will be filtered out of the atmosphere and none of our land will be usable.”

11. Barry Commoner predicted that decaying organic pollutants would use up all of the oxygen in America’s rivers, causing freshwater fish to suffocate.

12. Paul Ehrlich chimed in, predicting in 1970 that “air pollution…is certainly going to take hundreds of thousands of lives in the next few years alone.” Ehrlich sketched a scenario in which 200,000 Americans would die in 1973 during “smog disasters” in New York and Los Angeles.

13. Paul Ehrlich warned in the May 1970 issue of Audubon that DDT and other chlorinated hydrocarbons “may have substantially reduced the life expectancy of people born since 1945.” Ehrlich warned that Americans born since 1946…now had a life expectancy of only 49 years, and he predicted that if current patterns continued this expectancy would reach 42 years by 1980, when it might level out. (Hint: According to the most recent CDC report, life expectancy in the US is 78.8 years).

14. Ecologist Kenneth Watt declared, “By the year 2000, if present trends continue, we will be using up crude oil at such a rate…that there won’t be any more crude oil. You’ll drive up to the pump and say, `Fill ‘er up, buddy,’ and he’ll say, `I am very sorry, there isn’t any.’”

15. Harrison Brown, a scientist at the National Academy of Sciences, published a chart in Scientific American that looked at metal reserves and estimated the humanity would totally run out of copper shortly after 2000. Lead, zinc, tin, gold, and silver would be gone before 1990.

16. Sen. Gaylord Nelson wrote in Look that, “Dr. S. Dillon Ripley, secretary of the Smithsonian Institute, believes that in 25 years, somewhere between 75 and 80 percent of all the species of living animals will be extinct.”

17. In 1975, Paul Ehrlich predicted that “since more than nine-tenths of the original tropical rainforests will be removed in most areas within the next 30 years or so, it is expected that half of the organisms in these areas will vanish with it.”

18. Kenneth Watt warned about a pending Ice Age in a speech. “The world has been chilling sharply for about twenty years,” he declared. “If present trends continue, the world will be about four degrees colder for the global mean temperature in 1990, but eleven degrees colder in the year 2000. This is about twice what it would take to put us into an ice age.”

You can trade papers now and grade each other.

To participate in the annual affair, head to the Anchorage Museum at 11 am on Saturday. To participate in the March for Science, be on the Delaney Park Strip at 10 am sharp. We’ll be phoning it in, mired in our shame.