rosen380

rosen380 t1_jbjvh2w wrote

144 **MINUTES**, not **HOURS**. And to save you the math, that is out of 525,000 minutes per year. literally measured in hundredths of a percent.

The environmental impact of switching from an ICE to an EV is literally hundreds to thousands of times greater than the impact of having versus not having this carbon sequestration device.

It takes 100 similar improvements just to get to rounding error!

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What's next? A nickel per hour increase to minimum wage to help the poor?

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rosen380 t1_jbjlirs wrote

But that was the point I was making -- EVEN IF you could get these installed in every vehicle IMMEDIATELY (which we can't) and EVEN IF there was virtually no CO2 emissions related to building them and installing them and taking care of used filters (and there would be some), they'd have almost literally no impact.

It would be equivalent to enacting some sort of legislation that would reduce the average annual driving for Americans from 13,476 miles to 13,472 miles.

Sure, it is better if people drive even 4 miles less than they do now and every little bit helps, but in this instance we are talking about an absurdly tiny little bit.

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rosen380 t1_jbjervo wrote

Why stop there... lets put one on every vehicle in the US.

The average American driver drives 13,476 miles per year[1]. Times ~240 licensed drivers is 3.2T miles driven.

At 4.5 pounds of CO2 per 20,000 miles, that is 728M pounds of CO2 per year.

At 48 pounds per mature tree, that is like 15M trees.

Just for comparison, adding 15M trees, would add 0.0066% to the total number of trees in the US.

Or another way to look at it; 728M pounds of CO2 is what you get from burning 36.4M gallons of gasoline. For reference, in the US we burn about that much gasoline every 144 minutes on average.

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Even before you consider actually producing these devices, installing them and handling the used filters, they are rounding error on rounding error.

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[1]https://www.jdpower.com/cars/shopping-guides/what-is-the-average-miles-driven-per-year#:~:text=Calculating%20Your%20Mileage%20And%20Average,clocks%2013%2C476%20miles%20per%20year.

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rosen380 t1_jbjcayp wrote

You are right-- I missed the "ten" in front :(

Though it is still an exaggeration since (1) 4.5 pounds is (a little) less than a tenth of 48 pounds, and (2) 20,000 miles per year is certainly not a typically driven car; that is likely 95th-98th percentile.

In the US 12-15k is more typical and I'd guess the sort of folks who really care about the environment tend toward the lower end of that (choosing not to drive when not needed and combining trips).

Looks like ~14-18 equally one tree is closer to reality, and that is before comparing the CO2 output to build the system into the car and dealing with the used filters to I guess what the CO2 costs are to get a tree planted (in a way that it'll at least survive to maturity)

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rosen380 t1_jbixx7y wrote

https://www.usda.gov/media/blog/2015/03/17/power-one-tree-very-air-we-breathe#:~:text=According%20to%20the%20Arbor%20Day,and%20release%20oxygen%20in%2

That says a mature tree will absorb 48 pounds of co2 per year. CO2 is 20% carbon by weight, so that is 9.6 pounds.

If the car is capturing 4.5 pounds of carbon per 20k miles, then sounds like it is really more like 25-35% of what a tree does for normal driving distances

[Edit] Well, not even since the article says 4.5 pounds of co2, not carbon. In that case, it is more like 5-7%!

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rosen380 t1_j56xlnc wrote

That isn't part of the reason it was "downgraded" to dwarf planet though... per the IAU these are the requirements:

  1. It is in orbit around the Sun.
  2. It has sufficient mass to assume hydrostatic equilibrium (a nearly round shape).
  3. It has “cleared the neighborhood” around its orbit.

Pluto meets the first two, just not the third.

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