Block · one region of the page, as the scanner read it. It may hold a whole story, part of one, several, or an advertisement; stitching blocks into articles is the next step. Text is supplied OCR.
Page 20 · column 3 of 5 · from the scan, no model involved
When it comes to indoor air pollution, what you can’t see can hurt you.
Unfortunately, 99 percent of the airborne pollutants in your home are invisible to the naked eye.
What are they?
Dust mites, their carcasses and waste products. Pollen and spores from plants, molds and mildew. Tobacco and wood smoke from fireplaces or wood burning
90.1%