Research Breakthrough for Biodegradable Tires? – VOA Learning English (Aug 31, 2016)
Research Breakthrough for Biodegradable Tires? (2:26) http://av.voanews.com/clips/VLE/2016/08/25/78cf21e5-7fc1-4139-9a01-4f568fd7e806.mp3 Researchers say they have created a new synthetic rubber that could be used […….]