Even if the US economy shifts from coal to natural gas, America’s coal will probably be exported for use elsewhere in the world. In any event, natural gas, though somewhat less carbon-intensive than coal, is a fossil fuel; burning it will cause unacceptable climate damage.
即使美国经济从煤炭转向天然气，美国的煤炭也可能出口到世界其他地方。无论如何，尽管与燃煤相比碳排量较小，但天然气仍然是一种化石燃料；其燃烧对气候造成的破坏仍然不可接受。