Although because of the massive industrial base of the current sort of fossil fuel economy, even if all, for example, if electric cars were 100% of production immediately, it would take 20 years to replace the fleet.
虽然目前化石燃料经济的工业基础规模大。但是如果电动汽车立即达到100%的产量,用它们来替换现在的车辆需要20年。