With only hours left to produce a global climate accord, rifts emerged Friday between Western countries and China and its allies over how to share the burdens of reducing carbon pollution and helping vulnerable nations cope with the rising seas and extreme weather that comes with global warming .
China's deputy chief negotiator stood firm Friday on his nation's demand that rich countries should assume most responsibility for the costs and argued against an agreement that sets too-tough goals for weaning the world off using oil, gas and coal - the biggest source of carbon emissions.
Negotiators from more than 190 countries are aiming to create something that's never been done before: an agreement for all countries to reduce man-made emissions of carbon dioxide and other greenhouse gases and helping the poorest adapt to rising seas, fiercer weather and other impacts of global warming.
