Lesson 3 (natural resources) Lesson 3 (environmental problems in asia) Lesson 2 (physical characteristics) Lesson 2 (geography and asia) Lesson 4 (ethnolinguistic groups in asia) Lesson 3 (natural resources) Lesson 3 (environmental problems in asia) Lesson 2 (physical characteristics) Lesson 2 (geography and asia) Lesson 1 (all about asia) Lesson 5 (poverty level & human resources) 
