Glaciation created cycles of cooling and drying in Africa, further harsh conditions

(Chapter 15)

• (Chapter 15)

Glaciation created cycles of cooling and drying in Africa, further harsh conditions

• Glaciation created cycles of cooling and drying in Africa, further harsh conditions

• CO2 reduction leads to a change from C3 (trees, shrubs) to C4 (warm grasses)

Glaciation created cycles of cooling and drying in Africa, further harsh conditions

• Glaciation created cycles of cooling and drying in Africa, further harsh conditions

• CO2 reduction leads to a change from C3 (trees, shrubs) to C4 (warm grasses)