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| The rain that can damage the environment because it contains acid from factory smoke and car exhaust. |
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| A force that divides people and countries. |
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| A force that unites people and countries. |
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| A group of countries that acts as a single market, without trade barriers between member countries. |
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| The study of human populations, including how they change due to births, deaths, aging, and migration. |
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| The number of old and young dependents who don't work, compared to the working age population. |
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| The gradual wearing away of earths surface by the action of wind, water, ice, and gravity. |
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| A group of people in a country who share a unique culture and identity. |
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| The creation and movement of glaciers. |
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| The average age a person in a given population is expected to live. |
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| A large group of people who share a common history and culture. |
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| An independent state, or country, whose people mostly share a common identity. |
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| Feelings of loyalty towards ones nation or ethnic group. |
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| A form of energy that comes from nuclear reactions. Radiation has no smell or taste, but it can be very harmful to living things. |
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| Natural forces that change earth's physical features, including forces that build up and wear down earth's surface. |
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| The total fertility rate needed for a population to replace itself. |
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| A river and all the streams that it flows into. |
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| A political unit that controls a particular territory. |
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Term
| Supranational Cooperation |
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Definition
| A form of international cooperation in which countries give up some control of their affairs as they work together to achieve shared goals. |
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Definition
| The movement of plates below earth's surface. |
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| The average number of children a woman in a given population will have in her life time. |
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| Pollution that starts in one country and crosses boundaries into another country. |
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| The formation and eruption of volcanoes. |
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