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💡7 ways to improve indoor air quality and reduce air pollution in your home💡

Check air vents and replace filters to improve air quality
Bumper-to-bumper interstate traffic. Billowing industrial smokestacks. These are just a few of the images that spring to mind when we think about air pollution. But what about indoor air pollution? Do you ever think just how safe the air is inside your home?

The truth is, air pollution in your home can be just as bad - or even worse - than it is outdoors. And with the average American spending 87% of their life indoors, you’d think that indoor air quality would be something we’d hear about more often. But don’t panic! With a little preventative maintenance and some basic knowledge, you can take immediate steps to improve your indoor air quality today.

Common air pollutants.
Air pollutants can range from contaminants brought in from the outdoors by your pets to dangerous gas leaks. Carbon monoxide is a common air pollutant resulting from natural gas that escapes into your home without being burned off. Older homes may contain asbestos and lead particles, which can be damaging to the lungs when released into the air. In bathrooms and kitchens, mold and mildew can become a nuisance where moisture levels are typically higher than in the rest of your house.

Here are 7 things you can do right away to improve the air quality in your home:

💌1. Change your AC filter.
Air-conditioning systems are always working to give your home that perfect temperature all year round. But while they’re cycling through all that air, they’re filtering out some of those common air pollutants. Eventually, their air filters fill up and stop doing their job. Not only does that cause trouble for your indoor air quality, it also wears down your AC system, which can lead to costly repairs down the road. So, be sure to change your AC filters regularly, or get an air conditioning service plan which normally includes a filter change – especially if you are allergy-prone or live in a metropolitan area with high levels of pollution.

💌2. Don’t forget about other air filters.
Your AC filter isn’t the only thing working to keep the air clean in your home environment. If you really want to improve the air quality in your home, be sure to check the filters in your other household appliances. Your vacuum cleaner, clothes dryer and kitchen vents should all be inspected and maintained periodically. It’s recommended to clean or replace these common household filters every few months.

💌3. Check your air ducts.
Air ducts are responsible for distributing hot and cold air throughout your home, providing a comfortable climate in every room. But ducts that are not installed properly or maintained can distribute contaminants from one room to another. Over time, dust, dander and even mold can accumulate in your ducts, reducing the overall air quality. Hire a professional to make sure your ducts are circulating fresh, clean air.

💌4. Use cooking vents.
Many indoor air pollutants come from the kitchen. Gas stoves release harmful contaminants, including carbon monoxide and nitrogen dioxide. Even electric burners produce those same pollutants in lower levels, as well as other particles that can be easily absorbed into your bloodstream. So, when you’re cooking, be sure to turn on your kitchen vents, or open a window to help filter out the air even more.

💌5. Keep your rugs and carpets clean.
Rugs and carpets do more than increase the comfort of your home. They act as their own air filters, trapping dust and other particles in their many fibers. Clean your carpets and rugs weekly and they will keep working for you, improving the air quality in your home just by lying there!

Bringing plants into your home can help with air quality
💌6. Control humidity in your home.
Humid and moist conditions breed mold and mildew that can trigger respiratory issues like allergies and asthma. Depending on your location, the hot summer months can bring about especially humid conditions. Reduce the amount of moisture in the air and curb the growth of irritating molds with a few well-placed dehumidifiers. There are a variety of humidifier options that will help maintain consistent humidity levels and create comfortable living conditions in your home.

💌7. Buy indoor plants to freshen the air.
Plants are nature’s natural air filters. Buying a few indoor plants can do wonders to improve the indoor air quality in your home, while enhancing your home décor. Small plants like ferns and lilies (which bloom indoors) and larger palm trees are the best options to pull contaminants out of the air.

Pay attention to air pollution, but also pay attention to your health!！

Air pollution is one of the biggest environmental threats to human health, alongside climate change.

New WHO Global Air Quality Guidelines (AQGs) provide clear evidence of the damage air pollution inflicts on human health, at even lower concentrations than previously understood. The guidelines recommend new air quality levels to protect the health of populations, by reducing levels of key air pollutants, some of which also contribute to climate change.

Since WHO’s last 2005 global update, there has been a marked increase of evidence that shows how air pollution affects different aspects of health. For that reason, and after a systematic review of the accumulated evidence, WHO has adjusted almost all the AQGs levels downwards, warning that exceeding the new air quality guideline levels is associated with significant risks to health. At the same time, however, adhering to them could save millions of lives.

Every year, exposure to air pollution is estimated to cause 7 million premature deaths and result in the loss of millions more healthy years of life. In children, this could include reduced lung growth and function, respiratory infections and aggravated asthma. In adults, ischaemic heart disease and stroke are the most common causes of premature death attributable to outdoor air pollution, and evidence is also emerging of other effects such as diabetes and neurodegenerative conditions. This puts the burden of disease attributable to air pollution on a par with other major global health risks such as unhealthy diet and to***co smoking.

Air pollution is one of the biggest environmental threats to human health, alongside climate change. Improving air quality can enhance climate change mitigation efforts, while reducing emissions will in turn improve air quality. By striving to achieve these guideline levels, countries will be both protecting health as well as mitigating global climate change.

WHO’s new guidelines recommend air quality levels for 6 pollutants, where evidence has advanced the most on health effects from exposure. When action is taken on these so-called classical pollutants – particulate matter (PM), ozone (O₃), nitrogen dioxide (NO₂) sulfur dioxide (SO₂) and carbon monoxide (CO), it also has an impact on other damaging pollutants.

The health risks associated with particulate matter equal or smaller than 10 and 2.5 microns (µm) in diameter (PM₁₀ and PM₂.₅, respectively) are of particular public health relevance. Both PM₂.₅ and PM₁₀ are capable of penetrating deep into the lungs but PM₂.₅ can even enter the bloodstream, primarily resulting in cardiovascular and respiratory impacts, and also affecting other organs. PM is primarily generated by fuel combustion in different sectors, including transport, energy, households, industry, and from agriculture. In 2013, outdoor air pollution and particulate matter were classified as carcinogenic by WHO’s International Agency for Research on Cancer (IARC).

The guidelines also highlight good practices for the management of certain types of particulate matter (for example, black carbon/elemental carbon, ultrafine particles, particles originating from sand and dust storms) for which there is currently insufficient quantitative evidence to set air quality guideline levels. They are applicable to both outdoor and indoor environments globally, and cover all settings.

“Air pollution is a threat to health in all countries, but it hits people in low- and middle-income countries the hardest,” said WHO Director-General, Dr Tedros Adhanom Ghebreyesus. “WHO’s new Air Quality Guidelines are an evidence-based and practical tool for improving the quality of the air on which all life depends. I urge all countries and all those fighting to protect our environment to put them to use to reduce suffering and save lives.”

📌Air Pollution Is Harming People in the Global South. This Project Wants to Help.

Q. What’s a HEPA filter and can it catch particles as small as a coronavirus?

A: HEPA is the international gold standard for filtering particles—it means that 99.97 percent of particles 0.3 microns in diameter are trapped. For context, a human hair is 50 microns across. The HEPA standard is more than 100 times smaller because it’s more difficult to trap particles that are smaller or bigger because of the physics of filtration. Masks and filters are not sieves, and snagging a virus is not like panning for gold. Particles either flow past or stick to the fibers in a filter based on their inertia or ability to diffuse toward the fiber.

📌So yes, HEPA filters can catch particles that contain coronaviruses. People expel droplets of respiratory fluid, saliva, and possibly viruses into the air when breathing, coughing, and talking. Even if the water in the droplet evaporates, the droplets contain salts, proteins, and other material in addition to any virus, which means the remaining particles are typically a few microns in size, making them fairly easy to trap with a HEPA filter.

Example of a DIY Corsi-Rosenthal Box
A DIY Corsi-Rosenthal Box can be made with a box fan and an HVAC filter. (Photo: Festucarubra, Wikimedia Commons)
Q. How important is the EPA’s 0.3 micron HEPA standard, then?

A. HEPA is the gold standard, but filters that aren't HEPA can still help remove particles from indoor air. A homemade air purifier called the “Corsi-Rosenthal Box,” consisting of an HVAC filter and a box fan, are quite effective.

📌 https://news.columbia.edu/news/do-hepa-filters-really-catch-coronavirus-particles

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