Indicator database

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    Physical Trade Balance (PTB)

    The trade surplus or deficit of material resources within an economy, calculated as imports minus exports of raw materials and manufactured products.

    Demand-based material productivity

    Demand-based material productivity is a comprehensive measure. The original units are in physical terms: real income per unit of materials consumed. It is a planned indicator, and the OECD does not provide an inception timeline. (03.03.2015).

    Population density (people per sq. km of land area)

    Population density of a country is midyear population divided by land area in square kilometers. Population is based on the de facto definition of population, which counts all residents regardless of legal status or citizenship--except for refugees not permanently settled in the country of asylum, who are generally considered part of the population of their country of origin. Land area is a country's total area, excluding area under inland water bodies, national claims to continental shelf, and exclusive economic zones.

    Built-up areas

    The indicator measures the total built-up area in a country (in km2). Built-up areas are areas covered with buildings and greenhouses.

    Retrieved from: http://ec.europa.eu/eurostat/tgm/table.do?tab=table&init=1&plugin=0&lang... on 24/03/2015

    Area under organic farming

    The indicator measures the share of total utilized agricultural area occupied by organic farming (existing organically-farmed areas and areas in process of conversion). Organic farming is a method of production, which puts the highest emphasis on environmental protection and, with regard to livestock production, animal welfare considerations.
    Retrieved from http://ec.europa.eu/eurostat/tgm/web/table/description.jsp
    on 25/03/2015

    Built-up areas - percentage

    The indicator measures the total built-up area as a share of the total surface area of land in the country. Built-up areas are areas covered with buildings and greenhouses whereas non built-up areas include streets and sealed surfaces.
    Retrieved from http://ec.europa.eu/eurostat/tgm/table.do?tab=table&init=1&plugin=0&lang... on 26/03/2015