What’s Actually Floating Into Your Bedroom at 3 a.m.? A 25-Year Sleep Habit Reveals the Uncomfortable Truth
For 25 summers, opening the bedroom window felt like inviting fresh air and better sleep. But tracking what actually crosses that threshold by 3 a.m. reveals a more complicated picture: nighttime pollen surges, temperature inversions trapping pollution at ground level, and CO₂ accumulation that wakes you without you knowing why. Science suggests a smarter approach.