This volume provides case studies conducted in Malaysia based on environmental management and the sustainable development of human and ecological systems. The first chapter discusses awareness studies in environmental management in Terengganu, Malaysia. The second chapter is about human health risk assessment of heavy metals exposure due to freshwater fish ingestion from Sungai Kuantan, Malaysia. The third chapter discusses nickel and cadmium pollution in freshwater fishes in Kuantan River and Riau River. Chapter four discusses tourism sustainability. Chapters five and six provide an overview on particulate matter emissions at construction sites, and municipal solid waste (MSW) management approaches. In chapter seven, the book provides a general overview on cellulose and cellulose nanocrystals extraction. Finally, chapters eight and nine discuss legal measures for wildlife protection in Malaysia, and how improved environmental management practices are needed to achieve this. The book is intended for environmental managers, wildlife organizations, and students and researchers studying sustainable development, waste management, and corporate impacts on the environment.