This two-volume set explores the aspects of diversity of micro and macro algal forms, their traditional uses; their constituents which are of value for food, feed, specialty chemicals, bioactive compounds for several novel applications and bioenergy molecules. The industrial production systems, downstream processing, utilization of the biomass and the metabolites of importance for various applications are addressed. Innovations in production technologies, coupled with the biological activities of their novel metabolites and molecules, offer tremendous scope for the exploitation of these micro and macro algal forms through industrial production processes in a sustainable manner. These two volumes offer a treasure house of information to the students and researchers of plant sciences, biological sciences, agricultural sciences, foods and nutrition sciences, health sciences and environmental sciences. Their practical value will benefit professionals including agriculture and food experts, biotechnologists, ecologists, environmentalists, and biomass specialists. This set will also aid industries dealing with foods, nutraceuticals, pharmaceuticals , cosmecuticals health care products, and bioenergy.