Africa: Human-Environment Interaction Chapter 18 – Section 3 Pages 424-427 TEKS: 2A, 4A, 4C, 8B, 8C, 16A, 21A, 21C, 22A, 22B, 22C

Controlling the Nile For centuries, the Egyptians tried to control floodwaters on the Nile. The Aswan High Dam was completed in 1970. It created Lake Nasser. The creation of dams forced local tribes to move.

Oil in Nigeria: Harming Environment Nigeria – 6th leading oil exporter in the world. More than 4,000 oil spills in more than 40 years. Slow cleanup operations and fires.

Desertification of the Sahel Sahel - Dry grassland that runs E-W along the southern edge of the Sahara. People in the area use it for farming and herding.

Desertification of the Sahel Desertification - Moving of dry conditions into moist areas next to desert. Normally, it’s long term, but humans are causing it to speed up in the Sahel.

Reasons for the Desertification Overgrazing of vegetation by livestock Animals trample the soil Farming Drilling for water for irrigation Increased population