Coal prices also are low, owing to over-supply and the scaling-down of demand, especially from China, which burns half of the world's coal.
2017年6月六级真题(第一套)阅读 Section B
The advent of new technologies has added about 4.2 million barrels per day to the crude oil market, contributing to a global over-supply.
2017年6月六级真题(第一套)阅读 Section B