Thread was not created for advice. Plan for home has been in the works for over a year so I don't need another month. Lets just say that I'm old enough to make decisions
I suspect he's talking about the building's materials, such as carpeting, off-gassing VOC's which are sometimes toxic.
VOCs, or volatile organic compounds, are chemical byproducts found in many building supplies and products. Treated wood, insulation, carpeting, paints and cabinets all contain VOCs that will evaporate or off-gas into the air.