Questions tagged [air-quality]

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Is city air pollution causes allergy?

Is there any evidence (study) which shows correlation with city air to allergy (to anything) or any other breath health problems? If yes is this correlation different if someone lives in big city ...
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Effects of Exposure to Periodic, Long-term PM2.5 Pollution

The EPA's AQI quantifies air pollution, sets out ranges of pollution, and associates health risks with each range. Quoting from PurpleAir: "101-150: Members of sensitive groups may experience ...
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1answer
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Which is more harmful, high CO2 indoor or PM2.5 outdoor

Smoke has enveloped the outdoors in my area, the pm2.5 in the area is high, currently at levels categorized as very unhealthy AQI 201-300. I don't have many indoor plants so the CO2 level inside is ...
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How risk is related to PM2.5 level

Some areas are currently experiencing health warnings to stay inside due to poor air quality caused by smoke from wildfires causing high PM2.5 levels. How does the health risk depend on the PM2.5 ...
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1answer
75 views

Alternatives other than face-mask-respirators for protection against COVID-19 [closed]

Could someone please tell me if these alternatives can also protect one against being infected by COVID-19 virus, when being outside (in grocery stores, markets, etc)? If yes, how much of protection ...
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Risk level of formaldehyde inhalation

How do I estimate the risk level of inhaling a certain level of formaldehyde in the air? I looked up the EPA's assessment, and they list this summary report in their IRIS database. (By risk, do they ...
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1answer
39 views

Would an operating theater ringed with green plants increase infection risk or reduce it?

I believe that the filtering and oxygen production of green plants is well established. Do those plants NASA approves for air filtration "emit" anything other than clean oxygen and perhaps benign ...
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43 views

What is the lower end of C02 exposure, where negative health effects of not enough C02 start? [closed]

I am trying to optimize my indoor CO2 levels. I bought a monitor, which seems to be fairly accurate: When I air my flat thoroughly, for 30min with fans running, I am able to achieve about 450 ppm ...
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When trapped in an air pocket does breathing slowly prolong the amount of time you have? [closed]

So there is roughly 21% oxygen in the air. When taking a "normal" breath you saturate your blood with oxygen and exhale air with roughly 16% oxygen. With that in mind, I am curious if changing your ...
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1answer
106 views

Are aluminum profiles dangerous?

I am thinking about building racing rig from aluminium profiles. Something like this: Original image here: http://www.simracingmachines.com/images/builds/rig2014/IMG_1686s.jpg I would like to have ...
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35 views

Is cold plasma safe?

An HVAC installer is recommending cold plasma to fix HVAC systems with Dirty Sock Syndrome. But are the ions generated by cold plasma generating systems safe themselves? If I recall correctly, ...
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4k views

How far away from a highway should I live to avoid negative health effects?

Many articles on the internet claim that living near highways can be harmful to one's health. Here is an example: https://www.thestar.com/news/canada/2017/01/05/living-close-to-high-traffic-roads-...
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Are there any guidelines for the indoor air quality exposure limits for newborns or infants?

Are there any guidelines for the indoor air quality exposure limits for newborns or infants? I would like to find the guidelines for the indoor air quality parameters such as: Temperature Relative ...
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1answer
1k views

How do you filter out Benzene?

Benzene is (considered to be) a dangerous carcinogenic volatile organic compound. If somebody (oh, say, I dunno, a petrochemical plant maybe?) were to release some Benzene into the air where you live -...
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1answer
918 views

Do surgical masks effectively protect me against passive smoking and off-gases from cars?

I really find myself threatened by the amount of passive smoke and off-gases of cars I have to inhale every day. I know that surgical mask are not the ultimate solution to it, but can I protect myself ...
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Research paper on living in areas with fresh air after living for more than 20 years in polluted area and impact on health

Are there any reasearch paper which shows impact on health for the person which is moving from the city with high air pollution to the areas with more fresh air (like countryside)? Below are 2 main ...
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How bad is the pollution when living right on a road with heavy bus traffic?

I'm considering renting an apartment on the first floor right on a boulevard with a heavy bus traffic. The main air supply to the apartment is from that road, so it's pretty obvious you get a lot of ...
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1answer
49 views

Does nose-breathing filter out pollutants?

I live in a somewhat smoggy/polluted city, where the air pollution level regularly varies from totally clean to fairly dirty (3 mile visibility). When I'm exercising (cycling) and the air is on the ...
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57 views

Air Cooler and Health Issues

I am new to air cooling appliances at home. Now, I am planing to buy a air cooler ( not conditioner), but I heard that it will create health issues such as dust allergy, cold etc. Because It ...
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1answer
95 views

How to breath better when you live in a big city?

We know that big cities have bad effects on health, due to their poor quality of air. The main pollutants we find in the air are PM10, nitrogen dioxyde and ozone. These three pollutants hazardous to ...
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1answer
655 views

Carbon Dioxide Poisoning in Everyday Situations

I am wondering whether slight CO2 poisoning (hypercapnia) can be induced by everyday bad behaviour. I am particularly interested in the consequences of The prolonged use of a surgical mask (a.k.a. ...
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1answer
413 views

What are the pros and cons of various negative ion generators for health benefits?

I've come across quite a few in my research but I'm hoping to hear from someone who's had more experience. I work with computers and digital displays in my room that leave cations in the air (and I'm ...
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1answer
507 views

What are the dangers of breathing minerals that are dispersed into the air by a humidifier?

The Mayo Clinic warns against the use of tap water in a humidifier: Use distilled or demineralized water. Tap water contains minerals that can create deposits inside your humidifier that promote ...
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1answer
4k views

How humid should the air be to avoid epistaxis (i.e., nosebleed) induced by air dryness?

Many websites indicates that excessively dry air may cause epistaxis (i.e., nose bleeding). Example: Dry air is the most common cause of nosebleeds. Living in a dry climate and using a central ...
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cigarette vs exhaust gas [closed]

People always associate pollution to cars, but as a frequent biker, I don't really smell anything from exhaust pipes for all 'recent' cars. When a car passes me, I can always know by the smell if ...
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1answer
100 views

How is it determined that someone died from “air polution”?

I saw this question on another Stack Exchange site, and wondered, how do they even know that one person in China died from "air pollution"? How do these studies that lump millions of people into ...
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5k views

What is the ideal oxygen air percentage for longterm health?

I'm working on a science-fiction story, and a recent scene deals with someone tampering with the O2 levels of a ship's recycled atmosphere. I find myself wondering, what is the ideal oxygen level for ...
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2answers
388 views

Do HEPA air filters serve any health benefit?

I have been researching particulate matter pollution and air filters. I read about HEPA air filters and that they can capture over 99% of particles in the air, including allergens. I was thinking that ...
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1answer
177 views

How healthy are hands-free stenomasks?

I use hands-free stenomasks for extended periods of time. How healthy are they? I am mostly worried about the quality of the air I inhale, and I would like to know the effect on the skin to have ...