The acronym BOP (pronounced one letter at a time; it's not a catchy tune you can dance to) stands for Blowout ______, and it's a very important valve on an oil or gas well.

Oil is measured in barrels, which is equal to 42 US gallons or 159 liters.

Venezuela leads the world with 300.9 billion barrels of oil reserves – a 17.8 per cent share of global reserves.