In conjunction with Singapore's 50th birthday in August 2015, 50 Years of Environment: Singapore's Journey Towards Environmental Sustainability takes the reader through Singapore's environmental journey over the past 50 years, to its present day challenges and solutions, and seeks to explore what lies ahead for Singapore's environmental future. This book is divided into three parts. The first, drawn largely from the book Clean, Green and Blue: Singapore's Journey Towards Environmental and Water Sustainability, will explore the historical developments in Singapore's environmental journey and the development of NEWater. The second part will be a collection of essays that examine the present environmental challenges that Singapore faces and the ways in which it is addressing those issues through community engagement, international engagement, research and technology, and industry solutions in order to develop sustainable strategies and solutions. Part Three will bring the book to a close by tying the historical and contemporary threads together and discusses the future challenges for Singapore's environment.