Indicator database

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    Nitrogen oxides emissions

    Nitric oxide (NO) and nitrogen dioxide (NO2) are together referred to as nitrogen oxides (NOX). Combustion of fossil fuels is by far the dominant source of NOX emissions. The emissions are not dependent solely on the amount of nitrogen in the fuel but also on the air - fuel mix ratio. High temperatures and oxidation-rich conditions generally favour NOX formation in combustion.NOX contributes to acid deposition and eutrophication which in turn can lead to potential changes occurring in soil and water quality.

    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.

    Population, total

    "Total 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. The values shown are midyear estimates."

    (World Bank, http://data.worldbank.org/indicator/SP.POP.TOTL, 2014-12-10)

    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.