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Food pyramid (nutrition) Appearance. The USDA 's original food pyramid, from 1992 to 2005 [ 1 ] A food pyramid is a representation of the optimal number of servings to be eaten each day from each of the basic food groups. [ 2 ] The first pyramid was published in Sweden in 1974. [ 3 ][ 4 ][ 5 ] The 1992 pyramid introduced by the United States ...
Social class differences in food consumption refers to how the quantity and quality of food varies according to a person's social status or position in the social hierarchy [citation needed]. Various disciplines, including social, psychological, nutritional, and public health sciences, have examined this topic.
Demographic transition. In demography, demographic transition is a phenomenon and theory which refers to the historical shift from high birth rates and high death rates to low birth rates and low death rates, as societies attain more technology, education (especially women) and economic development. [1] The demographic transition has occurred ...
Urbanization (or urbanisation in British English) is the population shift from rural to urban areas, the corresponding decrease in the proportion of people living in rural areas, and the ways in which societies adapt to this change. It can also mean population growth in urban areas instead of rural ones. [1] It is predominantly the process by ...
The geography of food is a field of human geography.It focuses on patterns of food production and consumption on the local to global scale. Tracing these complex patterns helps geographers understand the unequal relationships between developed and developing countries in relation to the innovation, production, transportation, retail and consumption of food.
t. e. Central place theory is an urban geographical theory that seeks to explain the number, size and range of market services in a commercial system or human settlements in a residential system. [1] It was introduced in 1933 to explain the spatial distribution of cities across the landscape. [2] The theory was first analyzed by German ...
The Demography of the World Population from 1950 to 2100. Data source: United Nations — World Population Prospects 2017. Demography (from Ancient Greek δῆμος (dêmos) 'people, society' and -γραφία (-graphía) 'writing, drawing, description') [1] is the statistical study of human populations: their size, composition (e.g., ethnic group, age), and how they change through the ...
Urban ecosystem. In ecology, urban ecosystems are considered a ecosystem functional group within the intensive land-use biome. They are structurally complex ecosystems with highly heterogeneous and dynamic spatial structure that is created and maintained by humans. They include cities, smaller settlements and industrial areas, that are made up ...