And the topic of the week will be...climate change! (I'll resist the enormous temptation to make a joke about politicians and hot air). We've got a clear pattern for the campaign. One party launches a theme, the other attempts to trump them, and they slug it out until everyone gets bored and they move on to the next excuse for blather. After tax cuts and interest rates, this week we've arrived at climate change. Labor got the upper hand early on when it was reported that Malcolm Turnbull asked John Howard to ratify the Kyoto Protocol six weeks ago, but Howard refused. I think the real point here isn't that Howard doesn't really understand or care about climate change - we knew that already - but the amusing lack of cabinet solidarity the Liberals are displaying. Still, the reason Howard gives for refusing to sign Kyoto is that the agreement doesn't include the world's major emmitters, China and the U.S. But hang on, the reason that the U.S. isn't inclu