1999 - WAEC Chemistry Past Questions and Answers - page 5
41
Environmental pollution problems are generally more severe in countries which have
A
dense population
B
low birth rate
C
great land mass
D
limited industries
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42
The greenhouse effect is a climatic condition associated with the presence of excess
A
carbon (IV) oxide
B
hydrogen sulphide
C
nitrogen (ll) oxide
D
ammonia gas
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