1. Chapter 16 Key Terms mangrove – a tropical tree with roots both above and below the water savanna – a tropical grassland with only a few trees harmattan – a dusty wind that blows from the Sahara subsistence farm – a small plot where farmers can grow only enough to feed their families cacao – a tropical tree whose seeds are used to make chocolate and cocoa

2. Chapter 16 Key Terms compound – a group of houses surrounded by walls civil war – a fight among different groups within a country overgraze – allowing animals to strip the land so bare that plants cannot grow back drought – a long period of extreme dryness and water shortages desertification – the process of grasslands turning into deserts

3. Chapter 16 Key Terms bauxite – a mineral that is used to make aluminum phosphate – a mineral salt that is used in fertilizers