13. Why did people in the U.S. use asbestos in building materials before the 1970 s? __ 14. Why would school officials spend money to remove asbestos from school buildings? __

## Step1<br />The first question asks why people in the U.S. used asbestos in building materials before the 1970s. Asbestos is a naturally occurring mineral that was widely used in the construction industry due to its unique properties. It is highly durable, resistant to fire, and does not corrode or rust. These properties made it an ideal material for building construction.<br /><br />## Step2<br />The second question asks why school officials would spend money to remove asbestos from school buildings. The reason for this is that asbestos poses a significant health risk, particularly to children. When asbestos is disturbed, it can release tiny fibers into the air. If these fibers are inhaled, they can cause serious health issues such as lung cancer, mesothelioma, and asbestosis. Therefore, to ensure the safety and health of students and staff, it is crucial to remove asbestos from school buildings.