UN issues climate warning, three weeks till Paris summit

The UN warned Friday that nations' carbon-cutting pledges go nowhere near far enough to prevent dangerous global warming, as political efforts gain speed three weeks before a Paris summit tasked with sealing a climate rescue pact. National pledges to curb greenhouse gas emissions -- if respected -- would yield only a third of the cuts needed by 2030 to keep Earth from overheating, according to a UN Environment Programme (UNEP) report. The voluntary targets "are not sufficient to limit global tem