但如果想要保持航空旅行增长又不加剧全球变暖，就必须迅速降低与航空有关的二氧化碳排放。 与航空有关二氧化碳排放量巨大，并且没有写入去年12月190多个国家达成一致的巴黎气候协定。
But if we are to sustain growth in air travel without aggravating global warming, we must quickly reduce aviation-related CO2 emissions, which are substantial and not covered by the Paris climate agreement that more than 190 countries agreed to last December.