In the 1950s, it took nearly 15 man-hours to produce a ton of steel in the U.S. Now it takes around two. Technological advances have made it possible to produce the same amount of steel with a fraction of the workforce.
Copyright 2010 NPR
In the 1950s, it took nearly 15 man-hours to produce a ton of steel in the U.S. Now it takes around two. Technological advances have made it possible to produce the same amount of steel with a fraction of the workforce.
Copyright 2010 NPR