In 1931, Soviet scientists were on the hunt for a natural source of rubber that would help the USSR become self-sufficient in key materials.

Self sufficient 自給自足

Eventually ついに

But natural rubber disperses heat better and has better grip, which is why tires are made with a mix of both. 

Disperse 分散

https://www.dw.com/en/could-rubber-from-dandelions-make-tires-more-sustainable/a-56766389?maca=en-GK_RSS_SmartNews_Volltext_ENG-20051-xml-media