Distinguish between the tropical grassland and temperate grassland under the following headings

(a) Location (b) Climate (c) Vegetation characteristics 

(a) Explain the term natural environment

(b) Highlight four advantages and four disadvantages of man's intervention with the natural environment 

(a) Explain the following terms:
(i) Over-population;
(ii) Migration

(b) Describe any three factors which encourage the occurrence of each term in (a) above within a population group 
 

(a) Using specific examples, identify any three classes of settlements based on their functions

(b) Describe the characteristics of any two of the settlement types identified in (a) above. 
 

(a) Give three reasons why air transportation may be preferred to the other modes of transportation

(b) State any three disadvantages of air transportation

(c) How can these disadvantages be overcome?