Minor nitpick, but tailpipes aren't the primary source of emissions. The study is about PM2.5[0]. which will chiefly be tires and brake pads. Modern gasoline engines are relatively clean, outside of CO2, though diesel engines spit out a bunch of bad stuff.
Exactly. The noxious tailpipe emissions in a city are usually from diesel trucks, small vehicles like motorcycles (small or absent catalytic converters), modified vehicles (catalytic converter removed or diesel reprogrammed to smoke), but not modern gasoline ICE vehicles.
The love for diesel engines in many European countries was always confusing to me.
PM2.5 is also a broad category of particulates that come from many sources. The PM2.5 levels in the air depend on many sources, with wind being a major factor in changing PM2.5 levels. It’s hard to draw conclusions when a number depends on the weather and a lot of other inputs.
And turns out the whole thing was a lie. https://en.wikipedia.org/wiki/Diesel_emissions_scandal
It's unfortunate that so much rhetoric around environmentalism is based on faulty claims. It's starting to make me sceptical of environmental claims in general.
The latest one is AI data center water use- the extreme numbers like 5 liters of water per ChatGPT image just makes me feel sad that we can't have a civil discussion based on the facts. Everything is so polarized.
What does that even mean?
Honestly whatever it means it sounds like you would be the kind of person that would fall for the firehose of falsehood rather than look for the truth behind the actual claims.
Why? There are massive incentives for people to lie in a great many cases, especially where profits exist. Car manufactures, as we know, gladly lie and fake evidence. Even when there are massive fines involved, the fines are generally less than what they make in profit from the lies.
What's even better is you can play both sides to confuse the issue. Create 3rd party groups on the other side of your claims and have them make up the stupidest claims "Just looking at a car will give you cancer". Flood the zone with false information, bullshit asymmetry. Lobby the shit out of politicians so they don't care about the issues, only the money it brings in.
The confused regulars in the middle are so propagandized to they no longer know up from down and billionaires laugh all the way to the bank.
Someone incorrectly conveys a simple science concept, and people blame the scientist, not the communicator.
Like, News says "New revolutionary battery" and people roll their eyes and say "Oh but this will never make it to prod" and decide that scientists are liars and conveniently ignore that lithium battery density has like doubled over the past 20 years or so.
The person who was wrong was the unaware journalist taking a PR person's claims at face value, and having no context to smell test such a claim, and having no time or interest to treat the claim with skepticism anyway because "Batteries slightly improve" never sold newspapers.
But they blame science!