Bush under pressure to accept binding limits on emissions

8220;All eyes are now on President Bush8217;s speech,8221; said South African Environment Minister Marthinus van Schalkwyk through an aide. 8220;We hope he will signal a stronger commitment by the US to a multilateral solution and their willingness to engage on internationally agreed and binding emission reduction targets.8221;

German Environment Minister Sigmar Gabriel said the fact that Bush was speaking showed the White House would not return to its previous skepticism about the seriousness of the issue.

8220;This is a big step,8221; he told reporters. 8220;The more you have official discussions about climate change 8230; the more difficult it is to go backwards.8221;

White House spokeswoman Dana Perino said the president would talk about eliminating tariffs so poor countries could have better access to less-polluting energy sources.