A words

Acid Rain
Rain containing high amounts of chemical pollutants from the burning of fossil fuels
affirmative action
An active effort to improve educational and employment opportunities for minority groups and women
affluence
The state of having much wealth 
agent orange
A chemical herbicide used to clear jungle growth in the Vietnam 
airlift
A system of transporting food and supplies by aircraft into an area otherwise impossible to reach
alliance system
Defense agreements among nation
amnesty
The granting of pardon to a large number of persons; protection of prosecution for an illegal act
anarchist
Person who believes that there should be no government 
anarchy
disorder and lawlessness
anti-semitism
Hostility toward or discrimination against Jews 
apartheid
          Racial separation and economic and political discrimination against nonwhites, a policy formerly practiced in the republic of South Africa 
appeasement
Accepting demands in order to avoid conflict
arbitration
        Settling a dispute by agreeing to accept the decision of an impartial outsider
armistice
A temporary peace agreement to end fighting
arms race
The competition between the United States and the Soviet Union to build more weapons in an effort to surpass the others military strength
assembly line
A system with machines and workers arranged so that each person performs an assigned task again and again as items pass before him or her
assimilate
         To absorb a group into the culture of a larger population
autocracy
         Government in which one person has unlimited power