About ________ percent of Africa is still forested.
A) 40
B) 50
C) 70
D) 20
E) virtually none
Question 2
________ is a modification of shifting cultivation where crops are rotated around a village, fallow periods are shorter and soil may be enriched through household waste.
A) Bush fallow
B) Slash and burn
C) Pastoralism
D) Sedentary farming
E) none of the above