From Atoms to Materials

Checkpoint 13.7 (c) Collect used glass products, so that they can be made into new products again (d) Use previously used plastic bags to contain rubbish (b) U se paper or cotton bags, instead of plastic bags 1. State two environmental problems related to the extensive use of metals and plastics. 2. Some ways to reduce metal or plastic waste are shown below. Which of the ‘4Rs’ principle is applied? Write down your answers in the space provided. (a) Buy refillable products 104 © United Prime Educational Publishing (HK) Limited 2024 All rights reserved; no part of this publication may be reproduced, photocopied, recorded or otherwise, without the prior written permission of the Publisher. Sample