Some developed countries may express dissatisfaction.Logical formLearned from4 sentences. Developed nations may have responsibilities.Logical formLearned from4 sentences. Developed countries may account for some percent of (carbon dioxide emissions).Logical formLearned from4 sentences. Developed countries may bear responsibilities.Logical formLearned from4 sentences. Developed countries may show sincerity.Logical formLearned from4 sentences. (Emission cuts) can be by developed nations.Logical formLearned from4 sentences. Developed nations may be committed to (emission reduction targets).Logical formLearned from4 sentences. Leaders may pertain-to developed countries.Logical formLearned from4 sentences. Pledges may be made by developed countries.Logical formLearned from4 sentences. Targets may pertain-to developed countries.Logical formLearned from4 sentences. Some cities can be in developed countries.Logical formLearned from4 sentences. Developed countries may recognize a responsibility.Logical formLearned from4 sentences. Persons may call on some developed countries.Logical formLearned from4 sentences. An average (life expectancy) may rank at a bottom of some developed nations.Logical formLearned from4 sentences. Economic activities can be constituted-of-or-filled-with developed nations.Logical formLearned from4 sentences.