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.
1 an interrogative expression often used to test knowledge because I have missed so many classes, I had a hard time answering every question on today's surprise quiz Synonyms interrogative, problem Related Words brainteaser, conundrum, poser, puzzle, quiz, riddle, stickler, stumper, toughie (also toughy) Near Antonyms answer, response, solution.