In this course students review the current unsustainable path of the global environment and explore ways of shifting to a sustainable one that stabilizes population, reverses problems with climate change and pollution, and establishes a global society dependent on renewable energy sources such as hydrogen, solar, and other energy options. Ways to reverse the negative human ecological footprint on the earth's precious resources (such as water, air and soil) are examined. Major future challenges such as poverty, hunger, emerging and reemerging diseases, threats to biodiversity, species extinction, domestication of food crops as well as biotechnology and genetically modified foods are discussed.