Publisher's Synopsis
This is one of a series which explains to young children how raw materials are obtained, processed and used to make everyday products.;Focusing on the manufacture of plastics and their value in daily life, this book explains their usefulness as tough, waterproof, light, easily-cleaned, hard-wearing and cheap materials, how they can be made into any shape and their inability to rust or rot. It tells how plastics, once made from cow's milk, are now manufactured from oil and natural gas, and it also addresses the environmental issues.
