 It's obviously a heat-tolerant plant. Bridgestone said in a recent press release, natural rubber can be extracted from Guayuli's branches, bark, and roots. It can be farmed with existing crop row equipment, according to the company. Cultivating Guayuli helps diversify the world's natural rubber supply, allows Bridgestone to produce more rubber locally for the U.S. market, and contributes to the tiremaker's sustainability goals.