PAPER RECYCLING
BOOK CAMBRIDGE IELTS 1 ANSWER KEY GENERAL TRAINING READING PASSAGE 3 30 sustamable//replaceable 31 biodegradable 32 virgin fibre/pulp 33 governments//the government 34 advances 35 quality 36 contaminants 37 offices 38 sorted 39 (re) pulped 40 de-ink/remove ink/make white 41 refined