2. Do the next exercises.
2.Answers.
1) Cotton, wool and leather.
2) The first big petrochemical plant made ink for writing and drawing and for paint.
3) The petrochemical business grew because there were a lot of oil refineries and oil companies wanted to find ways to use these chemicals.
4) From 1920s to the 1940s.
5) Nylon, polystyrene and polyvinyl chloride (PVC).
6) Plastics do not rot or break up like natural materials.
3. Answer.
1) Plastic tooth brush, pens, mobile phone are the things that I use every day and that are made of petrochemical products.
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