New Scientist: The world is on track to meet its Kyoto protocol target, according to very preliminary data released for the first time today, but not solely through a global willingness to regulate greenhouse gases. The efforts of some countries to rein back emissions have been bolstered by an economic downturn in others, says the UN. This means the encouraging news could be reversed if governments do not put policies in place to slow and eventually reverse the trend. Thirty-nine nations have …