Bridgestone aims to make natural-rubber tires from a sustainable American southwest crop

Firestone Firehawk IndyCar race tires made with guayule rubberTo make tire production more sustainable, Bridgestone is turning to a desert shrub called guayule as a source of natural rubber. Native to northern Mexico and the southwestern United States, guayule is a heat-tolerant source of natural rubber that can be used to make tires, Bridgestone said in a recent press release. Natural rubber can be...