a substance obtained by or used in a chemical process, chemical /ˈkemɪkl/, the amount of grain, fruit, etc. that is grown in one season, crop / krɑːp/, a very large city with a population of over 10 million people, megacity /ˈmeɡəsɪti/, (of food, farming methods, etc.) produced or practised without using artificial chemicals, organic /ɔːrˈɡænɪk/, a chemical used for killing insects, pesticide /ˈpestɪsaɪd/, available in large amounts or numbers; more than enough, plentiful /ˈplentɪfl/, the act of keeping something in good condition, preservation /ˌprezərˈveɪʃn/, the act of keeping food, etc. cold in order to keep it fresh or preserve it, refrigeration /rɪˌfrɪdʒəˈreɪʃn/, dependent, reliant /rɪˈlaɪənt/, clever and complicated, sophisticated /səˈfɪstɪkeɪtɪd/

Unit 3

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