The EPA cut the PM2.5 standard from 12 to 9 in 2024 because studies kept finding harm below the old limit. Meanwhile wildfire smoke has reversed clean air progress in 35 states. What a HEPA filter measurably does — and what it cannot touch.
Cooking causes more home fires than anything else, and unattended equipment is 37% of them. Meanwhile 57% of home fire deaths happen where the smoke alarm was missing or dead — and 43% of failures were batteries someone removed.
A million-person meta-analysis found that sitting eight hours a day raised mortality by 59% in inactive people and by almost nothing in active ones. Then 83,013 accelerometer-tracked adults showed standing more gave no cardiovascular benefit at all.
US customers averaged 11 hours without power in 2024, double the previous decade — and 80% of it came from major events. What fails and when, why a battery beats a generator for most households, and the carbon monoxide rule that kills about 100 people a year.
US fraud losses hit $16 billion in 2025. The six-digit code texted to your phone can be relayed by a fake page in real time — and CISA ranks it last. What phishing-resistant authentication does differently, and the two free steps that matter most.
Exercise cuts falls by 23% at high certainty. Home modification cuts them 38% — but only for people already at risk. And in December 2024 the USPSTF recommended against vitamin D for fall prevention. What the Cochrane reviews actually found.
A 60,977-person study found that when you sleep predicts mortality better than how long you sleep — and that the supplement most people buy is the one sleep medicine recommends against. What the cohort data and clinical guidelines actually say.
Gas stoves raise indoor nitrogen dioxide by about 4 ppb — roughly three quarters of the WHO annual guideline on their own. What the peer-reviewed indoor air quality measurements found, why kitchen size matters more than the appliance, and which fixes actually work.
94% of Americans fall short of vitamin D from food, but only 5% are actually deficient. What the trials, the intake data and the new upper limits say about which nutrients you really need.
Full-scale fire experiments show a lithium-ion battery can charge quietly for hours, then go from first smoke to an unsurvivable room in about 30 seconds. What the data says about charging safely at home.
