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An unread, unused copy: no writing or highlighting, and no missing or damaged pages. Every book we sell is brand new, including our lowest-priced titles.
As the world's population keeps growing, finding sources of food has become more important. Readers discover how challenging it is to produce crops that are healthy for both people and the environment. They learn the methods being used to reduce chemical pesticides, increase nutrients in the soil, and give farmers a more stable source of income.