Reuters: The allure of $30 billion in climate aid for poor nations holds the key to helping restore confidence in U.N. talks on fighting global warming and stopping them from unravelling. But there’s only months to figure out a way to start deploying the cash, say the world body, negotiators and greens. A sense of despair has shrouded U.N. climate talks after what many say was a disappointing outcome of last December’s Copenhagen summit at which world leaders crafted a non-binding …