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.
4 to find an answer for through reasoning try to answer this riddle Synonyms solve, break, crack, dope (out), figure out, puzzle (out), resolve, riddle (out), unravel, unriddle, work, work outRelated Words conclude, decide, deduce, gather, infer, judge, reason; clear (up), iron out, straighten (out), unscramble, untangle, untie; assume, conjecture, ...