However, developing countries strongly insist that "it is unfair for developing countries to undertake the obligation to reduce the emission amount of carbon dioxide voluntarily on the basis of the outcome brought about by developed countries," and the task to establish the next scheme for Kyoto Protocol has regrettably made little progress, and some people say that Kyoto Protocol is transient and will probably end up as a failure.
しかしながら途上国の言い分である「先進国の結果責任に基づいて自主的に二酸化炭素排出量を減らす努力義務を途上国が負うのは身勝手」との意見も根強く、京都議定書の次のスキームを構築する作業は残念ながら遅遅として進んでおらず、京都議定書は一過性のもので失敗に終わる可能性が高いと見る意見がある。