Given that people spend about 90 percent of their time inside buildings, it’s not surprising that the indoor environment can have a substantial impact on health.
While this isn’t an issue that people often consider, it poses real problems. Of all building stock in the United States, 53 percent is more than 35 years old – and some of that contains hazardous construction materials like asbestos and lead. In fact, around 4 million US homes are exposing children to dangerously high levels of lead.