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P a g e
21. The chemical structure of plastic is very different from that of rubber.
22. John Wesley was a famous chemist.
23. Celluloid and Bakelite react to heat in the same way.
24. The mix of different varieties of plastic can make them less recyclable.
25. Adding starch into plastic does not necessarily make plastic more durable.
26. Some plastic containers have to be preserved in special conditions.
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