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  2. List of sovereign states - Wikipedia

    en.wikipedia.org/wiki/List_of_sovereign_states

    The following is a list providing an overview of sovereign states around the world with information on their status and recognition of their sovereignty. The 205 listed states can be divided into three categories based on membership within the United Nations System : 193 UN member states , [ 1 ] two UN General Assembly non-member observer ...

  3. List of ISO 3166 country codes - Wikipedia

    en.wikipedia.org/wiki/List_of_ISO_3166_country_codes

    United States Minor Outlying Islands (the) [13] [ai] United States Pacific Island Wildlife Refuges, [14] Navassa Island, and Wake Island [c] [d] United States: UM: UMI: 581: ISO 3166-2:UM [aj] United States of America (the) the United States of America: UN member US: USA: 840: ISO 3166-2:US.us United States Virgin Islands – See Virgin Islands ...

  4. Lists of sovereign states and dependent territories - Wikipedia

    en.wikipedia.org/wiki/Lists_of_sovereign_states...

    List of sovereign states by male to female income ratio; List of sovereign states by market capitalization of listed domestic companies; List of sovereign states by Official Development Assistance received; List of sovereign states by research and development spending; List of sovereign states by wealth inequality

  5. Ground-level ozone - Wikipedia

    en.wikipedia.org/wiki/Ground-level_ozone

    The IPCC believes that "measured stratospheric O3 losses over the past two decades have generated a negative forcing of the surface-troposphere system" of around 0.15 0.10 watts per square metre (W/m 2). [39] Furthermore, rising air temperatures often improve ozone-forming processes, which has a repercussion on climate, as well.

  6. List of countries and territories by the United Nations ...

    en.wikipedia.org/wiki/List_of_countries_and...

    This is a list of countries and territories by the United Nations geoscheme, including 193 UN member states, two UN observer states (the Holy See [note 1] and the State of Palestine), two states in free association with New Zealand (the Cook Islands and Niue), and 49 non-sovereign dependencies or territories, as well as Western Sahara (a disputed territory whose sovereignty is contested) and ...

  7. List of administrative divisions by country - Wikipedia

    en.wikipedia.org/wiki/List_of_administrative...

    List of sovereign states; List of political and geographic subdivisions by total area, comparing continents, countries, and first-level administrative country subdivisions. List of first-level administrative divisions by population; List of FIPS region codes in FIPS 10-4, withdrawn from the Federal Information Processing Standard (FIPS) in 2008

  8. Ozone - Wikipedia

    en.wikipedia.org/wiki/Ozone

    By default, these names pay no regard to the radicality of the ozone molecule. In an even more specific context, this can also name the non-radical singlet ground state, whereas the diradical state is named trioxidanediyl. Trioxidanediyl (or ozonide) is used, non-systematically, to refer to the substituent group (-OOO-). Care should be taken to ...

  9. List of sovereign states and dependent territories by ...

    en.wikipedia.org/wiki/List_of_sovereign_states...

    This list divides the world using the seven-continent model, with islands grouped into adjacent continents. Variations on are noted below and discussed in the following articles: Continent , Boundaries between the continents of Earth , and List of transcontinental countries .