3m mask fit

How to Do a Mask Fit Test: Poor Man’s Fit Test

Since mask fit-test machines cost $10,000, many people need a simpler, practical way to check that their mask is sealing properly on their face. This simple four-step “poor man’s fit test” will help people check the fit of their mask and find leaks. I was fortunate enough to visit 3M’s …

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The Causes of Air Pollution in Dhaka City, Bangladesh

Bangladesh’s air pollution levels reached an average of 86 micrograms in 2019. That means Dhaka, Bangladesh’s pollution levels are almost 9 times the WHO safe limit. With such high pollution levels, many may wonder where Dhaka and Bangladesh’s pollution actually comes from. Learn more: Overview of Bangladesh & Dhaka Air …

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Do HEPA Air Purifiers Remove PM2.5?

When I was coughing through Beijing’s airpocalypse and thinking about buying an air purifier, I wanted to know something first–do air purifiers really remove PM2.5? I wondered because I saw lots of air purifier tests on pollen, but pollen is generally 10 microns or larger, whereas I was really concerned …

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List of Cities with Best and Worst Air Quality in India

Ever wondered which cities in India have the best air quality and AQI? The city with the best AQI and cleanest air might not be where you think. I analyzed the data from the World Health Organization’s database of annual particulate pollution (PM2.5) averages for 122 cities. Here’s what I found. …

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AQI Standards of Different Countries (US, China, India)

AQI (air quality index) is a number that helps represent how bad air pollution is. However, it can get confusing as not all countries use the same AQI standard. In this article, we cover the differences between the US, China, and India AQI standards. AQI Standards: US vs. China vs. …

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Plum Stone from The Safer Air Project

5 Questions with Plum Stone, Founder of The Safer Air Project

Millions of people live with chronic illnesses, including asthma, cancer, auto-immune conditions, and long-COVID, and they all face an invisible threat: poor indoor air quality. Plum Stone, founder of The Safer Air Project, is on a mission to change that. Discover how Plum’s new charity fights for safer air in all buildings, protecting everyone’s health. Tune in to learn how we can all breathe easier, together.

Do Air Purifiers Work With Window Open?

Will my air purifier still work with a window open? Recent test data from Smart Air, air purifiers can still significantly reduce PM2.5 in a room even when a window is slightly cracked. Here’s what you should know: The Obvious: Air Purifiers Most Effective With Windows Closed No one doubts …

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Smart Air low cost purifiers

Smart Air is a social enterprise and certified B Corp that offers simple, no-nonsense air purifiers and provides free education to protect people from the harms of air pollution.

Certified B-Corp air purifier company
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