Most paper is made from wood. When trees are cut down, they are transported (11) ...11... land or water to paper (12) ...12.... Here they are cut down (13) ...13... pieces and crushed up. This wood (14) ...14... is then dried on a machine and made into paper. Paper-making is an important British (15) ...15..., and paper from Britain is exported to South Africa, Australia and many other (16) ...16.... Some of the wood (17) ...17... in British paper-making industry comes from trees grown in Britain, Norway, etc. One tree is needed for (18) ...18... 400 copies of a typical 40-page newspaper. If half the adults in Britain each buys one daily paper, this (19) ...19... up over 40,000 trees a day. Trees are being cut down (20) ...20... than they are being replaced.