Section 1: The Challenges of Our World
Vocabulary:
Ecology: The study of the relationship between living things and their environment.
Deforestation: The clearing of forests.
Ozone layer: A thin layer of gas in the upper atmosphere that shields Earth from the sun's ultraviolet rays.
Greenhouse effect: Global warming caused by the buildup of carbon dioxide in the atmosphere.
Acid rain: The rainfall that results when sulfur produces by factories mixes with moisture in the air.
Bioterrorism: The use of biological and chemical weapons in terrorist attacks.
Section 2: Global Visions
Peacekeeping force: A military force drawn from neutral members of the United Nations to settler conflicts and supervise truces.
Disarmament: A limit or reduction of armed forces and weapons.