Algae grow in a wide range of habitats, from freshwater lakes to rivers and oceans to deserts. They serve an important role not only in the aquatic ecosystem as primary producers but are also responsible for the release of oxygen into the atmosphere. Algae and their products are widely used in food, agriculture and a number of industries. In recent years it has been realized that algae can play a major role in the environment and biotechnology. This book contains 34 chapters covering the diverse aspects of algae. It will be useful for students, researchers, university teachers and those with a professional interest in the subject.