The majority of man-made fabrics were developed during the twentieth century. Divide the class into small groups and ask them to research a particular man-made fabric i.e. Neoprene [external link: article]; describing its properties and uses. Ask the children to research equivalent natural fabrics that were used before the invention of the man-made fabric. For instance, pupils can compare the neoprene wet suit with a nineteenth century diving suit. Discuss the benefits of man-made fabrics. Can the class think of any negative effects associated with modern production methods?