As part of an assignment I have to redisign a product using an eco-material. I choose phone covers. From the silicone, rubber or plastic ones I intend to redisign using bamboo or cork. I would like to have some insight on the matter, what are the main properties i should be looking for (e.g. shock absorption) and what should i plot (using a material selection software) to justify my choice. For example would a graph of young modulus Vs price be of intrest? Also any ideas on how bamboo and cork extraction and manufacture works? What are the main parametres that make my choice eco compatible (e.g. embodied energy, end of life etc.). Thank you for your answer.