See, these bombs would cause massive firestorms -- especially if they're dropped on large cities -- and the smoke, soot, and dust would rise up to the stratosphere and spread globally.

你看，这些炸弹会引起大规模的火灾风暴--特别是如果它们落在大城市上--烟雾、烟尘和灰尘会上升到平流层并蔓延到全球。