Green Gold has integrated the Callahan Recognitions with homeopathy, nutrition, and paramagnetic growing into a total approach to Houseplants, Gardening, Horticulture & Agriculture. We highly recommend buying this book, a small Green Gold houseplant formula, and watch this amazing book in action in your own home. Dr. Callahan's work is used extensively in sustainable natural growing circles. These principles have been used in China for milleniums and are know there as the Yen & the Yang and the Chi of Growing. The medical and agricultural applications are a major breakthrough and just waiting for global debut.