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Lecture_8__Population_and_Resources__Feb

Lecture_8__Population_and_Resources__Feb - Migration(cont...

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Migration (cont…) The Mexican Connection
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The Mexican Connection Why is there so much Mexican immigration into the U.S.? Pull not fight minimum wage Push factors: poverty (particularly rural) The poorest people are not going. Can’t afford the trip. Can’t leave families. Pull factors: Employers looking for those workers. Why?get money Who benefits from Mexican immigration into the U.S.? Mexican send money to family
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Population & Resources
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Global population Current global population : 6,399,885,000 (approximately) Every second 5 people are born and 2 people die -- net gain of 3 people. Trends in global population: 1000 A.D.: 300 million 1600: 500 million. 1800/1850: > 1 billion 1900: 1.6 billion 1950: 2.5 billion 1965: 3,268,225,000 (nearly doubled since then) 1985: 4,854,602,890 October 12, 1999: 6 billion Doubling time of 40 years; continued, would lead to: 12 billion in 40 years; 24 billion in 80 years, 48 billion in 120 years
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Human Population Growth: prehistoric to present
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The construction of global population Cautions re:
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