4 ms·

I don’t like it. That’s how you end up with kids that are allergic to everything and have weak immune systems overall. I understand the CO2 control but let the

I don’t like it. That’s how you end up with kids that are allergic to everything and have weak immune systems overall. I understand the CO2 control but let the dust and pollen flow!

ahaucnx 4y ago
Not sure if you are sarcastic or not but the place I live has at times air quality classified as "Hazardous" and then hospitals are full of people having problems to breathe. If you are concerned about the zero pm 2.5 environment, studies show negative health impacts from pm2.5 even on very low concentrations and the WHO just last year lowered their guideline levels to only 5 ug/m3 pm2.5.
- Dalewyn 4y ago
  I recall that allergies to some degree are caused by too little or too much immune system stimuli early in life. Remember that allergies are a malfunctioning of the immune system, treating non-hazardous things as hazardous and causing unnecessary inflamations. It's obviously better to breathe clean air than dirty air, but there is a point to be had that being in a "too clean" or "too dirty" environment when your immune system is still calibrating itself could have long-term negative consequences.
  - travisjungroth 4y ago
    It's not one spectrum from "too clean" to "too dirty". It's at the very least two. For example, let's say pollen and coal. What you're talking about, having allergy issues from too little exposure, applies to pollen. Let's call those "adaptive particles" (term I just made up). What you're talking about does not apply to coal. The ideal amount of coal particles in your lungs is zero. There is no age where it helps to get exposed, no allergy to avoid getting. Let's call these "non-adaptive particles". If you live in a city, it's very likely that the negative impact from these non-adaptive is way worse than the negative impact of missing out on the adaptive particles. Breathing the air, you're increasing your risk of asthma a lot to decrease your chance of allergies a bit.
bawolff 4y ago
I'm pretty sure PM2.5 dust and co2, isn't the type of "dirt" the hygine hypothesis is about. https://en.m.wikipedia.org/wiki/Hygiene_hypothesis https://en.m.wikipedia.org/wiki/Hygiene_hypothesis seems to suggest it is about specific microorganisms.
- thaumasiotes 4y ago
  No, but if you're filtering tiny particles, you're also filtering big particles.
  - wkat4242 4y ago
    Not really in my experience. My air purifier and separate air quality sensor both show near zero levels of PM2.5 in my house after running the purifier for hours but I can still see a lot of dust floating around with a flashlight.
  - filcuk 4y ago
    It is counterintuitive, but HEPA filter efficiency increases with smaller particles. https://bofainternational.com/en/our-technology/filter-technology/how-hepa-filters-work/ https://bofainternational.com/en/our-technology/filter-techn...
sinuhe69 4y ago
I like the idea of having a vaulted space, where you can control your environment and be safe. You can venture out any time you want, but if you don't or your health does not allow it, you have a safe harbor for you to recover. And your kids. Most importantly, your kids.
nibbleshifter 4y ago
When the "dust" is actually hazardous air pollution, yeah nah.
brmgb 4y ago
I don’t know where you live but the OP talks about London which has the same issue than here in Paris and is probably better than most large city in South East Asia. You can drop your pastoral dream of dust and pollen. The pollution is mostly diesel exhaust, industrial fumes and tire residues. That’s extremely unhealthy.

I don’t like it. That’s how you end up with kids that are allergic to everything and have weak immune systems overall. I understand the CO2 control but let the dust and pollen flow!

ahaucnx 4y ago

Not sure if you are sarcastic or not but the place I live has at times air quality classified as "Hazardous" and then hospitals are full of people having problems to breathe. If you are concerned about the zero pm 2.5 environment, studies show negative health impacts from pm2.5 even on very low concentrations and the WHO just last year lowered their guideline levels to only 5 ug/m3 pm2.5.

Dalewyn 4y ago
I recall that allergies to some degree are caused by too little or too much immune system stimuli early in life. Remember that allergies are a malfunctioning of the immune system, treating non-hazardous things as hazardous and causing unnecessary inflamations. It's obviously better to breathe clean air than dirty air, but there is a point to be had that being in a "too clean" or "too dirty" environment when your immune system is still calibrating itself could have long-term negative consequences.
- travisjungroth 4y ago
  It's not one spectrum from "too clean" to "too dirty". It's at the very least two. For example, let's say pollen and coal. What you're talking about, having allergy issues from too little exposure, applies to pollen. Let's call those "adaptive particles" (term I just made up). What you're talking about does not apply to coal. The ideal amount of coal particles in your lungs is zero. There is no age where it helps to get exposed, no allergy to avoid getting. Let's call these "non-adaptive particles". If you live in a city, it's very likely that the negative impact from these non-adaptive is way worse than the negative impact of missing out on the adaptive particles. Breathing the air, you're increasing your risk of asthma a lot to decrease your chance of allergies a bit.

bawolff 4y ago

I'm pretty sure PM2.5 dust and co2, isn't the type of "dirt" the hygine hypothesis is about. https://en.m.wikipedia.org/wiki/Hygiene_hypothesis https://en.m.wikipedia.org/wiki/Hygiene_hypothesis seems to suggest it is about specific microorganisms.

thaumasiotes 4y ago
No, but if you're filtering tiny particles, you're also filtering big particles.
- wkat4242 4y ago
  Not really in my experience. My air purifier and separate air quality sensor both show near zero levels of PM2.5 in my house after running the purifier for hours but I can still see a lot of dust floating around with a flashlight.
- filcuk 4y ago
  It is counterintuitive, but HEPA filter efficiency increases with smaller particles. https://bofainternational.com/en/our-technology/filter-technology/how-hepa-filters-work/ https://bofainternational.com/en/our-technology/filter-techn...

sinuhe69 4y ago

I like the idea of having a vaulted space, where you can control your environment and be safe. You can venture out any time you want, but if you don't or your health does not allow it, you have a safe harbor for you to recover. And your kids. Most importantly, your kids.

nibbleshifter 4y ago

When the "dust" is actually hazardous air pollution, yeah nah.

brmgb 4y ago

I don’t know where you live but the OP talks about London which has the same issue than here in Paris and is probably better than most large city in South East Asia. You can drop your pastoral dream of dust and pollen. The pollution is mostly diesel exhaust, industrial fumes and tire residues. That’s extremely unhealthy.