About
A site about air you can't see
ppm·ail·me is a small editorial project about indoor air — carbon dioxide, ventilation, particles and smoke — written from the symptom backwards.
Most air-quality writing starts with hardware. We start where you actually start: drowsy at 3 pm, headachy at 7 am, foggy in a building that everyone agrees "feels stuffy." Then we walk it back to a number you can measure for less than the cost of a office chair, and to fixes that are usually free.
Editorial & citation policy
- Every quantitative claim links a primary source — a peer-reviewed paper (with DOI), or a standards body (EPA, WHO, ASHRAE, OSHA, NIOSH, NOAA).
- We cite the pushback too. Where the science is contested — and parts of the CO₂-cognition literature are — the caveat sits on the same page as the claim.
- No fabricated statistics, no invented experts, no "studies show" without the study.
- Symptoms have many causes. Every symptom page includes the non-air explanations and when to see a clinician. This site is information, not medical advice.
- Corrections: write to hello@ppmail.me — errors get fixed on the page, with the date.
Money
The site may show ads and may in future use affiliate links (disclosed on the page and in the disclaimer). Nobody pays for placement in our guides, and no manufacturer has reviewed our copy.
Sister project
LessPix covers the other invisible dose — screen time, children's eyesight and daylight. Same editorial rules, same taste for measurable things over vibes.