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26. It won’t be possible to grow the same amount of food as before if the soil is rich enough.
27. Many young people worried that acid rain will happen so often in the future.
28. In stead of throw away all our waste paper, glass, metal and plastic, we can recycle a lot of it.
29. Almost all supermarket food today comes in paper or plastic containers, therefore, it is difficult to reducing the garbage.
30. I think it would be better since the government protects more land and grows more new trees.