non-biodegradable
adjective /ˌnɒn ˌbaɪəʊdɪˈɡreɪdəbl/
  /ˌnɑːn ˌbaɪəʊdɪˈɡreɪdəbl/
 - a substance or chemical that is non-biodegradable cannot be changed by the action of bacteria to a natural state that does not harm the environment opposite biodegradableTopics The environmentc2