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Explanation:Geology and the planets inner core and crust the magna and lava at varying planet depths
Because pesticides and chemical fertilizers can harm crops
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The planning of governments when it comes to running their countries is always based on demographics, and this is because the characteristics of the population are crucial for the planning and which direction it will go.
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Every government makes plans about running the country based on the demographic characteristics of its population. The reason for this is that the characteristics of the population are crucial for developing and focusing on certain sectors or avoiding others. Each country in the world has its own unique population with unique characteristics and this brings in a lot of different policies by the different governments.
If a population is highly educated, the government can focus its planning on the territary and quaternary economic sectors, as it will primarily have a labor force that would be most efficient in these sectors. If a population is very young, uneducated, and with a low level of skills, the chances are that the government will focus the country toward agriculture and extraction of natural resources, thus the primary sector. If a population is old and it is projected to get older then the government would most probably adopt a policy to invite people from other countries to move in that will contribute to its socio-economic development.
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The mean center of population is the place where an imaginary, flat, weightless, and rigid map of the United States would balance perfectly if all residents were of equal weight. Historically, the movement of the center of population has reflected the expansion of the country, the settling of the frontier, waves of immigration and migration west and south. Since 1790, the center of population has moved steadily westward, angling to the southwest in recent decades.
SOURCE: Geography Division, "Centers of Population Computation for the United States 1950-2010," issued March 2011, available at www.census.gov/geo/www/2010census/centerpop2010/COP2010_documentation.pdf. Consulted for historical reference: Historical Atlas of the United States, National Geographic Society, 1988.
NOTE: The Proclamation Line of 1763 limited British settlement to areas east of the Appalachian Mountains. Alaska and Hawaii were not included in the calculation of the mean center of population until 1950. Puerto Rico was not included in any decade. For more information on the mean center of population, an animated map, and other resources. This graphic is adapted from the "Census Atlas of the United States" published by the Census Bureau in 2007.
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