This is an open access book. This textbook is on interdisciplinary sustainability for energy engineering students. Future generations of engineers need to be game changers. The book is aimed to help future engineers redesigning their world, avoid harmful lockdowns, and avoid creating new problems while redesigning energy systems in economically profitable and ecologically sustainable ways. It explains the principles of ‘planetary boundaries’ addressing the most relevant ones throughout the book. The book’s focus is on the main ways to produce renewable power and heating. Technical and economical basic design principles are discussed. The book also includes the discussions on main energy storage solutions. Each section has also an overview of the impacts of renewable energy production on ecosystems. The book while written for university-level engineering students is a useful guide for engineers working on renewable energy projects.