This book is about understanding challenges in managing our environment and ensuring sustainability of this planet. It presents the critical state of our resources and threats to resource security due to overconsumption, pollution and poor and uneven governance. Role of key stakeholders such as the Government, Financing Institutions, Business and Communities is important. These stakeholders need to collaborate at multiple levels - viz. Local, Regional, National and Global. Chapters are devoted to describing the role of the above stakeholders with numerous case studies. The book can serve as a textbook to academia, a reference for policy makers and planners and a resource for conducting continuing education programs for the professionals to introduce both the concepts and practice experience on sustainability.