Plants provide many useful drugs. Some of these Plants have been used as Medicines for hundreds of years. The bark of the Cinchona tree was used 400 years ago to reduce fever. It is still used to make quinine, a Drug used to treat Malaria and other diseases. Another drug, called digitalis, is used in treating heart disease. It is made from the dried leaves of the purple foxglove plant. The Roots of the Mexican Yam are used in producing cortisone, a drug useful in treating Arthritis and a number of other diseases. Contents, 1. Introduction 2. Agroforests as an Alternative to Pure Plantations 3. Industrial Hemp 4. Economic Importance of Plants 5. The Importance of Plant Life 6. Root Vegetable 7. Fruit 8. Medicinal Plants 9. Wood 10. Cotton 11. Wheat 12. Rice 13. Tobacco 14. Economy from Bee Plants 15. Spice 16. Plants and the Environment 17. Flowering Plant