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Dust from car brakes more harmful than exhaust, study finds

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Re: Dust from car brakes more harmful than exhaust, study finds

#451
post #437
post #352

Earlier quoted context omitted.

> These locations are probably not financially sustainable. Farms, factories and logistics centres generally turn a profit. Not everyone has a desk job.

I am talking about taxation and being able to provide essential services. Not everything need to turn a 'profit' but government budgets are not unlimited.

Would you entertain the idea of people generally living in the city, but needing to commute to at least the factories and logistics centres?

Re: Dust from car brakes more harmful than exhaust, study finds

#453

> researchers grew human lung cells in a lab and exposed them to dust from car brakes and from diesel tailpipes, finding that brake dust caused greater injury to the cells. I couldn’t tell if the study found that car brakes are more harmful than exhausts, or that car brake chemicals are more harmful than exhaust fumes - but that may not be significant because they are produced in less quantities.

ooph. wouldn't the dust particles go through a whole lot of other bodily defense mechanisms before they reach actual lung cells?

Re: Dust from car brakes more harmful than exhaust, study finds

#454

> researchers grew human lung cells in a lab and exposed them to dust from car brakes and from diesel tailpipes, finding that brake dust caused greater injury to the cells. I couldn’t tell if the study found that car brakes are more harmful than exhausts, or that car brake chemicals are more harmful than exhaust fumes - but that may not be significant because they are produced in less quantities.

ooph. wouldn't the dust particles go through a whole lot of other bodily defense mechanisms before they reach actual lung cells?

Not if you're breathing through your mouth. Inhaled asthma medication has about the same consistency as brake dust.

Re: Dust from car brakes more harmful than exhaust, study finds

#455

Earlier quoted context omitted.

> much greater weight It was part of the astroturf effort to convince people that they are massively heavier, and you see it was successful with comments like this where it is claimed that they are “much greater” in weight with nothing quantified. Of course the hummer was heavier, but not everyone has the hummer. > full electric versions are only around 10% to 15% heavier than their direct ICE equivalent. https://the…

> > full electric versions are only around 10% to 15% heavier than their direct ICE equivalent. The actual range quoted in the table at that link is 11%-17%. > > A comparable ICE car the BMW 3 series 1570Kg - 1965Kg Interesting that one "ICE" car can vary in weight by over 25%, or almost 400kg. Maybe it's because that weight "range" isn't really for that ICE car. The low end of the range is suspiciously close to the…

I didn’t take me long to find this:

https://www.ultimatespecs.com/car-specs/BMW/119385/BMW-G20-3...

> Curb Weight : 4206 lbs / 1908 kg

I suspect if I looked through every model I’d find heavier ICE only but close enough I’d say.

Re: Dust from car brakes more harmful than exhaust, study finds

#456
post #416

Earlier quoted context omitted.

Make life require cars: more fatalities. Seems pretty evident. Arguably the conditions are better for personal electric vehicles and bicycles in Florida (than the comparatively frigid and rainy conditions of Sweden). Even the topography is flat[0][1], it's literally the perfect place for cycling, but the US has chosen something else. So, yes, if things are different they are different: comparable populations, a bette…

Florida may not get as cold as Sweden, but it's certainly not hurting for rain. https://247wallst.com/special-report/2024/02/02/discover-the...

It also has the opposite problem in terms of temperature. There are days when the wet bulb temperature in Florida requires humans to be in an air conditioned environment because they would otherwise literally die from the heat.

Re: Dust from car brakes more harmful than exhaust, study finds

#457
post #338

Earlier quoted context omitted.

Ionizers make small particles plate-out on surfaces instead of floating in the air. It makes the air itself cleaner to breathe etc, but I suppose it could make surfaces dirtier than they otherwise would be with these especially fine particles. Usually an air purifier with ionizer will have the ionization at the filter outlet, so only the very smallest particles are affected by this process.

But if the ionizer can make particles stick to surfaces, wouldn't that mean it can also make them stick to the lungs? Because, in that case it's not so clear it's a win is it?

the particles stick via static electricity, which doesn't work well on wet surfaces like your lungs. the bigger issue is that ionizers can mix with VOCs from cleaning products and generate ozone and formaldehyde as byproducts - i suspect this combination made me really sick at one point because im allergic to formaldehyde

Re: Dust from car brakes more harmful than exhaust, study finds

#458
post #215

Earlier quoted context omitted.

Are you familiar with how disk brakes on a car operate? They’re essentially a hydraulic piston clamping the brake pads against the rotor. When you let off the brake pedal, the pressure is removed, but there’s not a “retraction” of any kind. So there’s no pressure but nothing is actually making that gap. That article was articulating basically that the piston, when not compressing the brake pads, should not be too far…

I'm very familiar, having changed many sets over the years. If there's no air in the system, pulling fluid away from a hydraulic piston must retract it. It can't just sit there unless there's an air bubble to expand or so much negative pressure that it forms a vacuum somewhere. Even then, pressure on the atmosphere-facing side would push the piston back toward wherever the vacuum or air bubble is.

the seal/friction is what stops the disc from fully retracting.

There are clips you can buy to force the calipers apart. I wonder if this negatively affects safety though.

Re: Dust from car brakes more harmful than exhaust, study finds

#459
post #56

Earlier quoted context omitted.

I’ve biked to work in -15C. Get studded tires.

The vast majority of the population is simply not going to do that if they bike at all.

See what happens in other countries. Are they just tougher?

Re: Dust from car brakes more harmful than exhaust, study finds

#460
post #338

Earlier quoted context omitted.

Ionizers make small particles plate-out on surfaces instead of floating in the air. It makes the air itself cleaner to breathe etc, but I suppose it could make surfaces dirtier than they otherwise would be with these especially fine particles. Usually an air purifier with ionizer will have the ionization at the filter outlet, so only the very smallest particles are affected by this process.

But if the ionizer can make particles stick to surfaces, wouldn't that mean it can also make them stick to the lungs? Because, in that case it's not so clear it's a win is it?

The particles affected by the ionizer are already floating in the air that is being inhaled into the lungs. For the sake of this discussion (i.e. disregarding accidental generation of ozone), wouldn't it be better if those particles are taken out of the air, stuck to surfaces, so they're no longer being inhaled?
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