Operations at Mexican national oil company Pemex’s Tula refinery resumed two days ago after a three-week closure due to rail and road blockades by protesting teachers, a company source with knowledge of the matter told Reuters on Friday. The protest in particular hit the refinery’s ability to transport a growing stockpile of fuel oil, burned to generate electricity by plants owned and operated by state-run power company CFE. The Tula refinery located just north of Mexico City in Hidalgo state is the country’s second biggest with a daily crude oil processing capacity […]