PM2.5 is a particulate air pollutant that poses a major health concern to humans. They are tiny pollutants measuring 2.5 microns and below. PM2.5 can enter deep into the lungs and the blood stream. Prolonged exposure to PM2.5 can cause health effects like respiratory and cardiovascular diseases. Learn more about PM2.5, the best way to protect yourself from PM2.5 and other trends here.
Estimating Lifespan from the DIY 1.0 Longevity Tests The Blast HEPA is 20 times bigger than the DIY 1.0 and it is made of the same material. Thus, is it reasonable to think that the Blast HEPA will last 20 times as long? Not really, because the Blasts push more …
This article includes supplemental data for the main article “So You Thought Hong Kong’s Pollution Comes From the Mainland?” This supplemental data will show how high and low wind speeds affect the PM2.5 levels and hence Hong Kong’s pollution. Ultimately, this supplemental article draws the same conclusion as the main …
Air pollution is a serious problem in Hong Kong, and Hong Kongers often complain that the worst of it comes from Mainland China. Is that fact or a convenient scapegoat? After all, Hong Kong is a densely populated developed city with one of the busiest ports in the World – …
Hong Kong doesn’t come to mind when people think of air pollution. However, the data tells a different story–one that has important implications for Hong Kongers’ health. Hong Kong’s Air Pollution in Numbers I just analyzed data on Hong Kong’s pollution data and found that PM2.5 averaged 30 micrograms in 2018. …
Over 100 years after “London Fog,” is London’s air safe? I just analyzed data on London’s PM2.5 air pollution—tiny particles in the air measuring 2.5 microns and below. In 2018, London averaged 12 micrograms of PM2.5, that’s higher than the World Health Organisation annual limit. What Does That Mean? Based …
This article provides the testing method and data for the article Delhi’s Indoor Air Pollution Lower than Outdoors. Supplemental Materials 1. Test Method I collected data January 12th to January 29th, 2019. I collected data at each place once to avoid over-representing a single place in the data. These days were …
Whether indoor air is safer than outdoor air is an important question for the millions of people living in heavily polluted cities like Delhi or Bangalore. Yet I’ve heard a lot of disagreement about this question. Is indoor air really safer than outdoor air? Is it true for all areas …
New analysis from Smart Air shows that China is making progress on its “war on air pollution.” PM2.5 air pollution was down in 14 out of China’s 15 largest cities. Yet one region saw far more progress than the rest. South Sees Modest Air Quality Gains In southern China, from …
A new analysis of air quality from 15 of China’s largest cities shows that PM2.5 fell in all cities—except one. From Shenzhen to Xi’an, air pollution was down in 2018. Yet Zhengzhou, capital of Henan province, actually saw pollution rise 7%. With this increase, Zhengzhou now averages over …
Analyzing new air quality data, Smart Air found that Beijing’s PM2.5 dropped 14% in 2018 compared to the year before. Despite the improvement, Beijing still averages nearly five times the World Health Organization’s annual limit. Improvement Came Mostly from Winter Enforcement By breaking down the data month by month, analysis …
