Reuters: Australia’s Prime Minister Kevin Rudd won office promising to be a climate change warrior but his chief weapon — a carbon trade scheme to slash emissions — is falling victim to shifting politics and world financial tumult. A former diplomat, Rudd made ratification of the Kyoto climate pact — opposed by the former conservative government for more than a decade — his first act after winning November elections tinged green by the seeming onrush of climate shift. “The Rudd …