The US tire industry is being taken to task on sustainability, but it's rising to the occasion and responding positively. The tire industry CEOs are committing to research tire emissions amid the US Environmental Protection Agency's (EPA's) steps to regulate 6PPD, a common chemical found in car tires responsible for the death of salmon in the American Northwest. At the same time, in the Far East, Kumho Tire is joining hands with Synthos to develop sustainable tire materials.