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Squabble Over $100 Billion Aid Stalls Global Warming Deal

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A dispute about how to link greenhouse-gas emissions cuts to a promise from the wealthiest nations for $100 billion a year in climate aid emerged as a major stumbling block at UN talks on global warming.

After a week of discussions in Bonn, envoys from some 190 nations deadlocked about the formula countries will use in setting out their commitments on reducing fossil-fuel pollution in time for the deal they plan to sign in Paris in 2015.