This book includes the proceedings of the Sustaining Tomorrow 2020 symposium and summit which bring together research from experts in academia, industry, and policy arenas to uncover the challenges and to forge solutions to sustain tomorrow. To sustain tomorrow, we need to continuously make headway in Agriculture, Engineering, Energy, Environment, Economics, Water, among other necessities. This book disseminates the most recent advances in these fields and promotes collaborations to maximize opportunities for innovative solutions. Though primarily intended to offer an update for experts and researchers in the field, this book is equally useful as a valuable educational tool for relevant undergraduate and graduate courses. Key aspects covered include the better and more responsible engineering and management of energy conversion and conservation processes, the furthering of renewable energy technologies, improvements in water-agriculture nexus and energy-environment-economics relationship, and endorsing education, implementation, and evaluation of all-embracing sustainability.