EVs DO NOT EMIT MORE PM

Recently @OECD published a report about particulate matter (PM) from road transport. Newspaper headlines blared that electric vehicles where worse than combustion vehicles. That conclusion was wrong according to the report itself.

Let me show you.

The report (published december 7) can be found here: https://t.co/1HpicKexOt
It's main point is well taken: as cars get cleaner, fine particles emitted by brakes, tires and road surfaces will become more important.
The table comparing electric and combustion engines is on page 92. I took averages of low and high values to get the graph in the first tweet.
I merely took the averages. To get this.
I think it is a terrific report that pulls together a LOT of literature on fine particles that cars spew into the air and that make us sick.

We have ignored this problem for too long, and there's more here than simply exhaust!
I have just two gripes with the article:

1) Electric vehicle weight
It estimates batteries at 10 kg/kWh when in reality it's already below half of that. So it makes electric vehicles much too heavy and doesn't take into account that in 2030 they will be much lighter still.
2) Simply comparing grams
We know that the stuff that comes out of the exhaust pipe is really bad for your health.

How that compares to sand and rubber from the road (gram for gram and particle for particle) is still completely unclear. They state this clearly themselves.
We know that a lot of the stuff in there can be bad for your health (see table).

But how much is how bad and what is the impact of particle size? For the stuff that's not from the exhaust we basically have no idea.
These studies about road dust are the closest the report comes to quantifying this but as you can see it's a mess.
Even how vehicle characteristics influence PM is only very vaguely know.
So for me the summary:

We know particles emitted from the road and the wheels of cars make us sick but that's about it. More research is urgently needed so we can avoid millions of deaths.
And there is a LOT we can do!

By switching to electric vehicles we are probably eliminating some of the most harmful emissions (from tailpipes and brake pads).

We could try to make tires more wear resistant (probably not a top priority of manufacturers).
We can find out what materials in tires are worst and leave them out.

We can construct roads in a way that traps part of the particles or we might even vacuum them up before they are released out into the open.https://t.co/mxA62vhuDG
Most importantly we should use lighter cars. So a monster like this Cybertruck certainly doesn't make your neighborhood safer or healthier.
Bottom line: electric cars are less bad for the climate and air quality than regular cars, but once they eliminate tailpipe and brake pad emissions we should focus on emissions from tires and roads. And that's almost virgin territory. Time to get to work on that!

More from Economy

What do a Tory Peer, Selwyn Gummer (Lord Chadlington), David Sumner ( Sumner Group Holdings) and the Sanchez Perez family (drugs money, laundered through Gold mines) have in common?

It’s another company-saving a £50 million PPE contract shaggy dog story

Connections, connections


What a start to the story

“A bulletproof truck trundled down the road in downtown Lima, guarded by 18 policeman
They were wearing body armour & wielding high velocity rifles

No-one was taking any chances
This was a Special delivery for Peruvian Prosecutor for an anti drug trial


That was in 2011, the same year that Lord Chadlington’s daughter got married in Chadlington to Henry Allsopp.

Who was there?
Yes Kirstie Allsopp of Location, location, location and all this Covid nonsense fame) is his sister

Camilla, his Godmother

Jeremy Hunt

Cameron


Well. Come on. Lord Chadlington had been chair of the local Witney Conservative Association. It’s only fair.

Hang on. Julian Wheatland, Director of SCL Group/ Cambridge Analytica had also been chair of Witney Conservative Association...and campaigned for his mate Cameron

Are we sure Julian Wheatland and his side kick Alexander Nix were not there too @JolyonMaugham ?

I mean. They move in the same North Oxford circles.
On Jan 6, 2021, the always stellar Mr @deepakshenoy tweeted, this:

https://t.co/fa3GX9VnW0

Innocuous 1 sentence, but its a full economic theory at play.
Let me break it down for you. (1/n)


On September 30, 2020, I wrote an article for @CFASocietyIndia where I explained that RBI is all set to lose its ability to set interest rates if it continues to fiddle with the exchange rate (2/n)

What do I mean, "fiddle with the exchange rate"?

In essence, if RBI opts and continues to manage exchange rate, then that is "fiddling with the exchange rate"

RBI has done that in the past and has restarted it in 2020 - very explicitly. (3/n)

First in March 2020, it opened a Dollar/INR swap of $2B with far leg to be unwound in September 2020.

Implying INR will be bought from the open markets in order to prevent INR from falling vis a vis USD (4/n)

The Second aspect is now, that dollar inflow is happening, and the forex reserves swelled -> implying the rupee is appreciating, RBI again intervened from September, by selling INR in spot markets. (5/n)
https://t.co/9kpWP7ovyM

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एक बार देवराज इन्द्र अपनी सभा में बैठे थे, तो उन्हे खुद पर अभिमान हो आया।


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