Use libraries and borrow books, buy used and e-books! Why?
Each year ~ 30 million trees are used to make books sold in US, many of which are sourced from endangered forests.
U.S. book industry uses less than 10% recycled fiber for its paper (some publishers are better than others).
Nutrient - a substance that provides essential nourishment for growth and the maintenance of life.
Foods are composed chiefly of carbohydrates, fats, proteins, water, vitamins, and minerals. Carbohydrates, fats, proteins, and water represent virtually all the weight of food. Carbohydrates, fats, and proteins comprise 90% of the dry weight of foods.