The article discusses the historical context and evolution of air conditioning (AC) usage, from the 19th-century tuberculosis advice promoting outdoor activity to today's indoor, climate-controlled lifestyle. While AC significantly reduces heat-related illnesses and aids in combating pollution by filtering harmful air particles, experts warn of the potential respiratory issues linked to prolonged indoor air exposure. The benefits include improved air quality and protection for vulnerable populations, but an emphasis on moderation and healthier indoor practices is suggested to alleviate potential negative effects.
AC is critical in areas with pollution. Its filters can cleanse the air of particulate matter 2.5, a toxin shed in vehicle exhaust, industrial activity, and wildfires. Research shows that PM2.5 enters homes and contributes to heart and lung disease—but these effects aren't as severe in places with more AC use.
AC’s benefits go beyond its cooling effect. A well-working AC system filters the air to reduce intake of dust, pollen, and airborne pathogens.
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