1.1 What are the characteristics of a desert environment that make it extreme? 1.2 How is human activity causing pressures on the desert environment? 1.3 What are the strategies that can be used to manage human activity in deserts? 1.4 What are the characteristics of the arctic and alpine tundra environment that make it extreme? 1.5 How is human activity causing pressures on the alpine tundra environment? 1.6 What are the strategies that can be used to manage human activity in alpine tundra