Book excerpt: This book vividly brings out the complexities, intricacies and constraints in developing and adopting appropriate sustainable technologies in the applied fields of Agriculture, Environment, Biomedical & Animal Genetic Engineering, Immunology etc. It covers Biosensors, Bioremediation, Biofertilizers, Fermentation, Immunization, DNA Transportation, Biopesticides, Sustainable strategies, Agriculture, Animal & Health Sectors etc. It will be of great use not only to teachers and students of Biotechnology and Life Sciences but also to farm scientists, extension managers, policy makers and administrators alike. The readers, through this book, will explore new avenues to alleviate the human and other biospheric sufferings because of poverty, ignorance, mismanagement and diseases particularly in developing countries. Spread in 28 chapters the book discusses: Recombinant DNA Technology Sustainable Biotechnology Immunology, Toxicology and Animal Biotechnology Microbial Fermentation and Biotechnology