(a) Highlight any three advantages of each of the following modes of transport (i) Rail (ii) Water 
(b) Give four reasons why some countries in Africa have not been able to sustain their rail transport 
 

(a) Define the term mass wasting

(b) Describe two types of mass wasting

(c) State three effects of mass wasting
 

(a) Highlight the characteristics of the equatorial rain-forest

(b) Outline four ways in which climate influences the equatorial rain-forest 
 

(a) What is environmental pollution?

(b) Describe four causes of environmental pollution

(c) Outline three ways in which environmental pollution can be controlled 
 

(a) Define Ecosystem

(b) Describe four ways in which man has interfered with the ecosystem

(c) Outline three consequences of man's interference with the ecosystem.