Morgan Stanley analysts recently included this chart of crude production costs. Onshore Middle East oil sites are much cheaper to tap than North American shale, which costs about $65 per barrel to extract.
1. ponder-reflect deeply on a subject; I mulled over the events of the afternoon; philosophers have speculated on the question of God for thousands of years; The scientist must stop to observe and start to excogitate.
PPDB, the paraphrase database (0.00 / 0 votes) Rate these synonyms: List of paraphrases: challenges, problem, defiance, defi, dÃ©fi, gauntlet, difficulty, defy, contest, reto, task, provocation, recusal, challenging, difficult, issue, difficulties, obstacle, contestation. disqualification