{
  "id": 278038,
  "title": "Scientists Monitored Bedrooms at Night. What They Found Was Alarming",
  "url": "https://urgent.news/2026/08/07/scientists-monitored-bedrooms-at-night-what-they-found-was-alarming",
  "topic": "health",
  "section": "Health & Medicine",
  "published": "2026-08-07T19:08:38.000Z",
  "source": {
    "name": "Newsweek",
    "slug": "newsweek",
    "url": "https://www.newsweek.com/scientists-monitored-bedrooms-at-night-what-they-found-was-alarming-12295733"
  },
  "original_language": "en",
  "account": "Scientists have recently uncovered alarming findings about the air quality in bedrooms across the UK. In 2015, researchers conducted a study monitoring air quality in homes throughout a Scottish winter. The results showed that in more than 80% of the homes, carbon dioxide (CO2) levels remained above safe thresholds all night long. Surprisingly, over 90% of the residents surveyed believed their bedroom air quality was satisfactory.\n\nAs climate change continues to exacerbate heatwaves, the issue of poor indoor air quality is resurfacing as a summer risk. Global temperatures are rising, and homes are not designed to withstand such extreme conditions, putting occupants at risk. Dr. Devjoy Dev, a biomedical engineer and sleep specialist, explained to Newsweek that global warming leads to sudden and extreme heat waves, particularly in regions where air conditioning infrastructure is lacking.\n\nDr. Ayesha Bryant, a clinical adviser at Alpas Wellness, emphasized that nighttime CO2 levels in bedrooms can exceed 1,520 parts per million (ppm). While high CO2 levels themselves do not have immediate health implications, they indicate poor air exchange within the room. Trapped CO2 and moisture can degrade sleep quality, which is not felt until people fall asleep. The self-regulation of air quality during wakefulness ends when people are asleep, allowing CO2 and moisture to accumulate.\n\nExperts advise that controlling bedroom environmental cues, such as light, eating schedules, and temperature, is crucial for achieving quality sleep. Poor airflow, closed doors, weak insulation, and west-facing windows exacerbate heat buildup in bedrooms. Amerisleep research from June revealed that 52% of Americans consider themselves hot sleepers, with 94% experiencing weekly sleep disruptions due to heat. Women are twice as likely as men to experience heat-related sleep disturbances.\n\nTo combat this issue, Bryant recommends keeping trickle vents unobstructed and airing rooms during cooler outdoor temperatures. The German practice of \"Lüften,\" or airing out rooms, can help purge stale and humid air. Dehumidifiers, costing between £90 and £300, can help maintain optimal humidity levels around 60%. For rooms that remain persistently hot, upgrading HVAC systems or adding dedicated air conditioning is recommended. Additionally, addressing any mold or condensation issues promptly is essential to maintain a healthy sleep environment.",
  "summary": "Scientists say your bedroom traps stale air and heat overnight—and most people never notice until their sleep suffers.",
  "key_points": [
    "Study monitored bedrooms at night in Scottish homes during winter 2015.",
    "82% of homes had CO2 levels above safe thresholds all night long.",
    "Poor indoor air quality risks resurface due to global warming."
  ],
  "editors_take": null,
  "illustration": "https://urgent.news/ill/278038.png",
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}