Question

wet pulp, which(3)__________in the 2nd century BC in China. However, early writing (4)_________material (always) from wood. In fact, the word paper comes (5)________from papyrus plants which (6) ________ by the Egyptians to make a form of paper in 3,000 B.C. When machines for-paper making (7) _______ in the 19th century, paper became easy to afford. Today, one of the problems with the huge production of paper is that a chemical called chlorine (8) _________ to make the paper white. Recycling is important, because chlorine (9) _______ and less energy (10)__________for recycled paper.​

Answer 1

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