* a Scherman tank requires half a ton of rubber
* IG Faben built Auschwitz plant to produce synthetic rubber none was
  produced during the war
* a speed limit was set to 35 mph during WWII to conserve rubber

* fireball express - US effort to airlift war materiel to supply China
  during WWII

* a third of fertile women in 1950es in Puerto Rico were sterilized