<span>The Paleolithic age started about 750,000 B.C. to 500,000 B.C. and ended around approximately 8,500 B.C.</span>
The Mexican Revolution was a huge rebellion that occurred from 1910-1920.
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The presence in the air of one or more contaminants in such a concentration and of such duration as to cause a nuisance or to be injurious to human life, animal life or vegetation.
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Aumento del costo de los servicios con tendencia al colapso. - Aumento de los impuesto y del coste de la vida en general. - Descenso de la calidad de vida
