DOHA, Qatar – Highlighting a rift between the rich countries and emerging economies like China, New Zealand's climate minister staunchly defended his government's decision to drop out of the emissions pact for developed nations, saying it's an outdated and insufficient response to global warming.

Other key issues at the conference, now starting its second week, include how to help emerging nations switch to climate-friendly energy sources and charting the course for a new treaty that would replace the Kyoto Protocol, which covers only developed countries.

New Zealand announced before the U.N.'s climate talks started here last week that it would not take part in the second phase of the Kyoto treaty. That angered climate activists and stunned small neighboring island nations, who fear they could be submerged by rising sea levels spurred by global warming.