During the Chávez presidency, Venezuela reclassified its reserves. Previously, there were thought to be just 80 billion barrels of extractable oil, but by 2011, its reported figure had nearly quadrupled. That statistical change was made possible by high oil prices at the time, which allowed previously unviable projects to look feasible.
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At the moment they do not know the long-term consequences of this pollution on the make-up of Earth's atmosphere, but it is unlikely to be good.