Environmental education is a key focus in Geography which is compulsory subject at the lower secondary level. At the lower secondary level, students study about managing the changing environment in topics like land supply, water resources, pollution, global warming and ozone depletion. At the upper secondary level, students study about climate change, resource depletion, food security, environmental management and sustainable development. These topics are discussed using real-world examples and case studies drawn from both the developed and developing countries.