Iron(II) sulfate was used in the textile industry for centuries as a dye fixative. It is used historically to blacken leather and as a constituent of ink. The preparation of sulfuric acid ('oil of vitriol') by the distillation of green vitriol (Iron(II) sulfate) has been known for at least 700 years. Together with other iron compounds, ferrous sulfate is used to fortify foods and to treat and prevent iron deficiency anemia. Constipation is a frequent and uncomfortable side effect associated with the administration of oral iron supplements. Stool softeners often are prescribed to prevent constipation. Ferrous sulfate was used in the manufacture
History of the Venezuelan oil industry in Venezuela has suffered from a poor oil market and Venezuela’s insufficient funding of the industry. Venezuela’s nationalistic oil policies have not succeeded in making them more independent from their oil customers. In 2016, the United States imported 291,461,000 barrels of oils from Venezuela, an amount consistent with imports in the five years prior. To assuage the oil price decline which began back in June 2014 and continues through to today, President Maduro printed more currency, resulting in inflation as high as 700% of what the inflation rate was in 2014.. The Economic policy of the Nicolás Maduro administration did