Nick Butler is a visiting professor at King's College London and a former senior executive at energy company BP.
Continent-wide stockpile would prevent oil shortage when geopolitics cut off supply


Huangzeshan oil storage and transportation base, pictured on May 12: China does not seem likely to share details of its strategic stockpiles. © Imaginechina/AP
Nick Butler is a visiting professor at King's College London and a former senior executive at energy company BP.