Leaders from 80 nations are expected to take part in a special United Nations meeting today in New York to jump-start talks on how to deal with climate change and how to replace the Kyoto treaty. President Bush has decided to skip the meeting, but he will attend a closed-door dinner tonight. Later this week, President Bush plans to host his own meeting on global warming. He has invited 15 countries that are major emitters of greenhouse gases to meet in Washington for two days. Bush hopes to persuade these countries to come to a consensus that would allow each nation to set its own policies rather than having limits imposed by a binding international treaty.