• 中文
2-lo-2

The Four Horsemen of the Airpocalypse

What are the harbingers of Beijing’s End of (clear) Days? Each polluted city’s smog is unique. It sounds strange, but just like the cuisine or architecture, every city that is…

read more
hepa-lo

How HEPA Filters Work

Rightfully regarded as the most important component in a purifier, the HEPA (or HEPA-like) filter is your main weapon in the fight for clean air, and the one you’re most…

read more