It's because of disagreement about how emissions that cross place borders must be allocated: do they belong towards the region of departure or country of origin? How are connecting flights accounted for? The tensions in reaching international aviation and shipping specials are talked over intimately inside the Carbon Short below. https://cruztfqcv.blogunteer.com/28936810/how-much-you-need-to-expect-you-ll-pay-for-a-good-emissions-reporting