(S (S (PP (IN Despite) (BASENP (PRPD their) (JJ recyclable) (NN nature))) (COMMA ,) (S (NP (NP (DT an) (NP (ADJP (JJ estimated)) (NP (BASENP (QP (NN 6.67) (NN billion))) (CC or) (BASENP (QP (NN 36,700) (NNS tonnes)))))) (PP (IN of) (BASENP (JJ plastic) (NNS bags)))) (VP (VBP are) (VP (VP (VP (VP (VBN disposed) (PP (IN of))) (PP (IN in) (BASENP (NN landfill) (NNS sites)))) (PP (IN throughout) (BASENP (NNP Australia)))) (BASENP (DT each) (NN year)))))) (PERIOD .))