Start with a question.
The questions people actually ask about their homes, answered in plain language first. Every answer links down to the research behind it.
Your water
Your air
Why is the air inside my house worse than outside?A modern home seals tight and traps what gets made inside it, so the air indoors often reads worse than the air on your street.Do I need an air purifier?An air purifier helps if your problem is airborne particles: cooking smoke, wildfire haze, traffic soot, pollen, or pet dander.Is my gas stove a problem for my air?Cooking on a gas burner releases nitrogen dioxide, fine particles, and benzene right where you breathe, and a tight modern home traps it.Why does my bedroom feel stuffy at night?A closed bedroom feels stuffy because the carbon dioxide you exhale builds up faster than the room can swap it for fresh air.What should the humidity be in my house?Aim for 40 to 50 percent relative humidity in the rooms you spend time in.I found mold. How bad is it?A small patch you can see and reach is usually a homeowner job, not an emergency.Is that new-furniture or fresh-paint smell bad for me?That smell is off-gassing: volatile organic compounds (VOCs) evaporating from new paint, furniture, and flooring.
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