Sustainability addresses the idea of a global society founded on respect for nature, universal human rights, economic justice, and a culture of peace. It is of vital importance and will affect everyone. Mathematics is essential in identifying and analyzing the challenges. Through a sequence of sustainability and mathematical concepts, exercises, and projects, you will be brought along on this journey and confront global challenges to develop an understanding of the complex environmental, economic, and sociocultural interlinkages, and to empower yourself to become an active citizen.