GEF

104 UNIT 5 The Importance of Biodiversity Objectives In this unit, students will learn to: ■■ Identify the Earth’s biosphere. ■■ Define biodiversity as nature’s risk management tool. ■■ Explore the benefits of biodiversity to humans. ■■ Discuss the biodiversity crisis: tropical forests and oceans. ■■ Recognize biodiversity threats and protection strategies.