The Conversation Asbestos is a naturally occurring mineral which humans have been mining for more than 4,000 years, principally for its fire - retardant properties. Mining and production of asbestos increased substantially from the end of the industrial revolution in the ... 更多 »
The Epoch Times Use fire - resistant materials on the exterior of your home or treat combustible materials with fire - retardant chemicals approved by Underwriters Laboratories or another nationally recognized laboratory. Clean roof and gutters. Keep fire extinguishers on ... 更多 »
Net Newsledger Use fire - resistant or noncombustible materials on the roof and exterior structure of the dwelling, or treat wood or combustible material used in roofs, siding, decking or trim with fire - retardant chemicals evaluated by a nationally recognized ...
