The pending closure of two California refineries has oil companies and environmental groups seeing more eye-to-eye.

Energy ministers talked through production capacity, investment and the green transition at this week’s OPEC conference in ...

OPEC Secretary-General Haitham al-Ghais speaks to CNBC's Dan Murphy from the group's biennial oil seminar in Vienna, Austria.

OPEC Secretary General Haitham Al Ghais joins CNBC's Dan Murphy at the group's international seminar in Vienna to discuss oil ...