Thus, if a group of countries decides to have lower emissions, worldwide emissions will decline by the sum of these countries’ reductions. Sure, it would be better if all countries curtailed their emissions, but it is already a great help if at least some countries do so.
许多人相信二氧化碳的总体排放是各国独立决定的结果。因此，如果某些国家决定减少排放，那么，全球排放就会随之下降相应的数量。的确，如果所有的国家都限制其排放就是再好不过的了，但是，即使某些国家这样做也是大有帮助。