sentence: Most paper is made from pine, spruce and eucalyptus.
sentences_before: Wood can be turned into paper in large factories called 'paper mills'. The wood is first chopped into small chips and cooked with chemicals in large vessels. The chemicals separate a substance called 'cellulose' off the wood. The cellulose is then added with other chemicals and additives, and pressed into paper in large machines called 'paper machines'.
concept_name: paper
headings: Wood
categories: Basic English 850 words