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  2. Air pollution in Mexico City - Wikipedia

    en.wikipedia.org/wiki/Air_pollution_in_Mexico_City

    Members of sensible groups can present serious issues. This interval activates the phases precontingencia (precontingency) and contingencia fase I (1st contingency phase) of the Programa de Contingencias Ambientales Atmosféricas(PCAA) del Valle de México (Atmospheric Environmental Contingencies Program of Mexico City).

  3. Contamination - Wikipedia

    en.wikipedia.org/wiki/Contamination

    Within the sciences, the word "contamination" can take on a variety of subtle differences in meaning, whether the contaminant is a solid or a liquid, [3] as well as the variance of environment the contaminant is found to be in. [2] A contaminant may even be more abstract, as in the case of an unwanted energy source that may interfere with a process. [2]

  4. Pollution - Wikipedia

    en.wikipedia.org/wiki/Pollution

    Various definitions of pollution exist, which may or may not recognize certain types, such as noise pollution or greenhouse gases.The United States Environmental Protection Administration defines pollution as "Any substances in water, soil, or air that degrade the natural quality of the environment, offend the senses of sight, taste, or smell, or cause a health hazard.

  5. Sumidero Canyon - Wikipedia

    en.wikipedia.org/wiki/Sumidero_Canyon

    Sumidero Canyon (Spanish: Cañón del Sumidero) is a deep natural canyon located just north of the city of Chiapa de Corzo in the state of Chiapas, in southern Mexico.The canyon's creation began around the same time as the Grand Canyon in the U.S. state of Arizona, by a crack in the area's crust and subsequent erosion by the Grijalva River, which still runs through it.

  6. Sierra Nevada National Park (Venezuela) - Wikipedia

    en.wikipedia.org/wiki/Sierra_Nevada_National...

    The park includes the Sierra Nevada de Mérida, one of the two branches of the Cordillera de Mérida in the central Andes of Venezuela. The area is rugged and contains the main peaks of the country: Pico Bolívar (4,978 m), Pico Humboldt (4,942 m), Pico La Concha (4,922 m), Pico Bonpland (4,883 m), and Pico Espejo (4,609 m).

  7. Barranquilla - Wikipedia

    en.wikipedia.org/wiki/Barranquilla

    Barranquilla (Latin American Spanish pronunciation: [baraŋˈkiʝa] ⓘ) is the capital district of the Atlántico department in Colombia.It is located near the Caribbean Sea and is the largest city and third port [5] in the Caribbean coast region; as of 2018, it had a population of 1,206,319 [6] [2] making it Colombia's fourth-most populous city after Bogotá, Medellín, and Cali.

  8. Spanish National Health System - Wikipedia

    en.wikipedia.org/wiki/Spanish_National_Health_System

    The Spanish National Health System (Spanish: Sistema Nacional de Salud, SNS) is the agglomeration of public healthcare services that has existed in Spain since it was established through and structured by the Ley General de Sanidad (the "Health General Law") of 1986.

  9. Víctor Celorio - Wikipedia

    en.wikipedia.org/wiki/Víctor_Celorio

    Inventor Victor Celorio operating one of his InstaBook, book making machines. As an inventor, Celorio obtained patents for the technology popularly known as InstaBook or Book On Demand, [3] as well as that of distributed printing technology in which a digital file is distributed among as many printing centers as required for immediate production and delivery.