PM2.5 Particulate Matter

Standalone air purifiers can reduce particles and may reduce some VOCs if they contain substantial activated carbon. The article distinguishes PM10 dust-related particles from smaller PM2.5 smoke, combustion, and pollution particles. Parts of India have PM2.5 levels of 130 µg/m³ — 26 times the WHO limit — with widespread normalization and no mask use. The article says MERV 11 is generally safe for many HVAC systems, while MERV 13 or higher may require newer systems or modifications. The WHO standard for PM2.5 is 5 µg/m³, and wearing a mask is warranted at levels above this threshold. The study did not establish a definitive mechanism linking PM2.5 to diabetes, but proposed several theories. PM2.5 particles are smaller than 2.5 micrometers in diameter, making them extraordinarily small. PM2.5 particulate matter is especially harmful because it lodges in the body and is extremely difficult to remove. PM2.5 may contribute to thrombosis through platelet activation, coagulation changes, and tissue factor expression. PM 2.5 at dangerous concentrations affects multiple organ systems simultaneously, not just the respiratory system. Regular cleaning and dust removal are presented as major…