In 2000 the United States was the world’s largest importer of petroleum, taking in over 10 million barrels/day (bbl/d), consuming one-quarter of the world’s petroleum output but producing less than 10% of global bbl/d.[1] in 2019 the United States was a net exporter of petroleum and petroleum products – and the world’s largest producer.
What happened?
In two words: hydraulic fracturing, or in one word, fracking.
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