This book examines contemporary challenges to sustainability, including population, climate change, decreasing biodiversity, land degradation, and water quality. Each chapter analyzes one of these challenges by first providing an introduction to the topic as well as key concepts to provide readers with a basic understanding of the issue. Essays deepen comprehension by investigating different aspects of the challenge. Case studies written by experts in the field follow. Each case study considers how a specific country is affected by the particular issue as well as the measures the country is taking to find solutions that will provide for a more sustainable future. The final chapter of the book explores sustainability at a global level by examining, through annotated primary documents, a number of multinational initiatives and alliances intended to create a more sustainable planet.