In New York City, congestion pricing leads to marked drop in pollution

> Particulates issued from tailpipes can aggravate asthma and heart disease and increase the risk of lung cancer and heart attack. Globally, they are a leading risk factor for premature death.

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.

[0] https://www.nature.com/articles/s44407-025-00037-2

> 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.

> The love for diesel engines in many European countries was always confusing to me.

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.

>It's starting to make me sceptical of environmental claims in general.

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.

For 99.9% of issues, we rely on trust to make up our minds. We assume people are mostly not lying. If a group of people are found to lie, then yes, maybe “look for the truth behind the actual claims” is worth it, but more likely shooting them out of the discourse and into the metaphorical sun is the right response. If you walk around lying, you don’t get to complain that people aren’t doing research on your claims.