During his White House meeting yesterday, Ban ki Moon asked president Bush to personally attend a high-level UN meeting on climate change, scheduled this September in New York.
From UN News:
Secretary-General Ban Ki-moon today invited United States President George W. Bush to attend a high-level United Nations debate on climate change to be held this fall.
“On climate change, which is a very important issue for all humankind, I appreciate President Bush’s initiative, during the Heiligendamm G-8 Summit meeting,” Mr. Ban told reporters after his meeting with the US leader in Washington, DC.
You can read President Bush’s statement here.