Examlex
A zero-sum game is one where a player will always end up gaining nothing, regardless of his strategy.
Pollution
The introduction of contaminants into the natural environment causing adverse change.
Mass Transit
Public transportation systems that move large numbers of people efficiently across cities and surrounding areas.
Natural Increase
The growth in population size as a result of more births than deaths, excluding migration.
Infrastructure
The fundamental physical and organizational structures and facilities needed for the operation of a society or enterprise.
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