At the UN Climate Change Conference in Montreal, the US has rejected a broad Canadian proposal that called on countries to begin talks on a global framework for further reduction of greenhouse gas emissions. The Bush administration says it opposes the proposal because it falls under the rubric of the 1992 Kyoto protocol. Kyoto, which mandates countries to meet specific targets in cutting greenhouse gas emissions, went into effect in February without the participation of the US and Australia. The US, which emits 25 percent of the world’s greenhouse gases, says regulating emissions standards should be left up to individual nations.