United States is already the biggest oil producer in the world

Bob Dudley, director of the company British Petroleum, announced that the United States is the largest producer of oil in the world, according to its report of last year's data.
"America has it surpassed Saudi Arabia and Russia as the leading producer of oil for the first time since 1975," it reported based on the Statistical Abstract of World Energy 2015.
In addition to their imports have decreased, including those offered by Petroleos Mexicanos (Pemex), its outstanding rise was due to extraction of oil shale by fracking, a technique that fractured rock by injecting water under high pressure, which can generate earthquakes and contaminate large amounts of human vital liquid, according to recent studies.
According to the Agency for Environmental Protection of the United States, the "vast majority of fresh water wells used" and on average, each spent 5.7 million liters of water.
"The [production] implications of the US shale revolution are profound," said Dudley in London.
The BP chief economist, Spencer Dale, said that growth in the United States was 1.6 million barrels a day, which also earned him the first to grow its production by more than one million barrels a day for three consecutive years.
The world oil supply rose in total last year to 2.1 million barrels per day.
The Texas Intermediate crude oil (WTI) rose again Tuesday strongly 2.14 percent to settle at $ 61.43 a barrel, after learning an increase in oil demand.
In this context, yesterday the Department of Energy of the US government said in a statement that its oil production since mid-2014 has been more resistant to lower oil prices than many expected.
On June 4, the Agency for Environment Protection (EPA in its acronym in English) released its report on the vulnerabilities that fracking poses for drinking water. The paper admits that this mining technique involves certain dangers by high consumption of water resources and contamination of groundwater.
Both patents are most aquifers showing extraction of gas by fracturing the rock containing it by injecting water under high pressure chemical threats.
EU is at the forefront of this method of extraction gasística. The EPA estimates that 9.4 million people live within 1.6 kilometers of wells and 6000 800 water sources that serve the public network are in that range. Water for 8.6 million citizens in 2013.
However, the EPA maintains that, so far, fracking has not led to "systematic and widespread impact" on water for human consumption. The damaging potential fracking focuses, according to the collection agency, first, on the huge amount of water required by this way to bring out pockets of gas locked in underground rock. The data report that between 2011 and 2012 166 320 million liters were required. The document says that is 1% of the water used annually in the country.

1. The second axis on which is based the study's own groundwater contamination due to the large quantity and toxicity of chemicals that are injected with water. The EPA says that "there have been cases, both for routine activities and accidents, which have involved impacts on surface and groundwater." And then he says that "spills of fluids used for fracking and contaminated water reserves have reached drinking water."