Countries across the world denominate oil export revenue in U.S. dollars - the "petrodollar."
This system props up the U.S. dollar's value because it creates demand for the dollar.
But recent developments beg the question, "Will the petrodollar collapse in 2015?"
Watch the video to see how the world's largest energy exporter and largest importer are working together to bring down the petrodollar - and shift away from the U.S. dollar:
This video is our second installment in a series profiling five looming threats to the U.S. dollar. Watch them all here: