If you're in the mood, I'm going to talk a little this afternoon about the mechanisms by which slowing down would inevitably decrease ecosystem degradation.
The term "Climate Change" is both a real thing and a vast understatement of our situation. Climate change is just one.

I usually use @ClimateBen 's list because it is good enough, but - it's even worse than Ben's list, and I bet Ben agrees.

3. Any action which does not address Ben's list is not meaningful climate action. The climate's not going to get well until the ecosystem does. This is obvious on the face of it: the ecosystem created the climate we had before. Everybody knows it. So.

4. The phrase "reduce emissions" is essentially meaningless when applied on a machine-by-machine basis. You've heard all this from me. I say, to slow down, just that, will help, and help fast. How does that work?
It works at about the level of high school science class. Thusly:

5. We are emitting carbon to obtain energy, and all we do with that energy is add speed to processes we would have anyway.
Speed and energy are the same thing. Speed is a characteristic of on object with a high amount of energy in it.
If we slow down, five miles an hour average

6. We will immediately reduce our carbon emissions.
Immediately. What else happens?
Commerce is not done based on distance, it's done based on time. People don't go ten miles to the grocery store, they go fifteen or twenty minutes to the grocery store.
It is a historic fact

7. That the average distance to shopping steadily increased with the average speed of surface transportation.
The advent of freeway-type urban transportation immediately shot up the average distance to shopping, and drastically reduced the number of stores per unit of population.

8. Slowing surface transportation speed will cause commerce to fill in at the appropriate time distances.
This is why I advocate doing it slowly, at a pre-announced rate. 5 mph per year. Even 2½ per year.
Each incremental slowing will directly reduce energy consumption emissions

9. As localized services fill in as demanded by society (need a grocery store within 15 minutes of you), distances traveled will decrease. So now we are consuming less fuel per mile / kilometer, and training fewer miles as well, multiplying climate improvement.

10. The visible speed is only a tiny bit of the energy / emissions the speed consumes / creates.
Why do we need an infrastructure project? (Besides to hire a lot of guys like me who are useless in the infoservice economy)
We just built *this* infrastructure.

11. We built virtually *all* of this infrastructure in my life. We have been bulldozing land and pouring concrete to accelerate the flow of traffic in America since my 10th birthday in 1957.
Every. Single. Day
The energy imbedded in the roads our fast traffic demands is

12. And in the 63 years since we poured the first mile of it, we have been sinking more energy into building highways, manufacturing portland cement and pouring gazillions of untold tons of carbon into the atmosphere so we could go faster.
No other reason. Just that. Period.

13. We had to build the cars - there's somewhere around two billion to three billion cars and light trucks on Earth today, on a rolling journey between five and ten years long between the factory and the scrapyard.
We make all the tires, which, where they go is,

14. Tires are one of the major microplastics in freshwater, and presumably in our blood and urine, since they're made out of an endless flow of water from Earth, through us, back to Earth.
All those energy demands would immediately decrease by no other change than slowing down.

15. No complicated formulas, no cap and trade, none of that.
At 5 mph per year, in 40 years you'd be at horse speeds. Walking speeds.
Back to that infrastructure. Why is it broken? I mean, we (meaning me and my generation) bought like a gazillion tons of good concrete.

16. Speed is energy. We've got tons and tons (regularly up to 80,000 pounds) rolling down these highways bouncing up and down on these little rubber footprints, and it just beats the concrete to dust.
Like a million jackhammers all day and all night.

17. When you take the same weight, but move it faster, it hits harder on a geometric scale.
A 5 mph reduction in national speed limit would completely obviate the need for new highway infrastructure. If it didn't, reduce by another 5.
These changes are not draconian or silly.

18. And these changes could result in greater carbon emissions reductions in calendar 2021 than the entire build turbines and solar panels plan is expected to do by 2030.
Are we serious, or playing make believe?

19. The end user machine, the individual car or truck, makes visible the consumption of a tiny fraction of the energy required to make it move. The entire global petroleum industry exists to move that car, and without said industry that car can't move.
Every oil well on Earth.

20. Slowing down, systematically, would reduce the volume of consumer goods flowing from factories to landfills.
Most of what we see around us in America today couldn't be maintained without high speeds. There is a reason towns didn't look like this in 1952.

21. One individual human's sphere of influence is proportional to her speed. There is, in modern climate-aware society, a running subtext of overpopulation, but no acknowledgement of the fact that a 60 mph human is *vastly* bigger on Earth.
If we'd slow down there would be room.

22. Here, take a look at my favorite video, and think what it would look like if each of these people with a donkey cart was, instead, alone in a three ton steel box. How crowded would it be then?
Why on Earth would the steel boxes be better? In what way?

23. This is no hippy dippy mumbo jumbo. This is a specific proposal:
Reduce speed limits nationwide at every level by 2½ mph yearly until nothing goes faster than a running horse.
Provide subsidies like governments do to encourage the building of necessary infrastructure.

24. I challenge any other specific proposal to show equal ecosystem benefit per unit of time or money, or equal possibility of actually getting to any stated emissions goal in the same time frame.
Come on. We can't slow down two and a half miles an hour, a year, for a planet?

Errata 9: training s/b traveling