Reuters: The impact of climate change is accelerating at an "alarming" pace and urgent action must be taken, U.N. Secretary-General Ban Ki-moon said on Wednesday. "What is frightening is that the scientists are now reviewing their predictions, recognizing that climate change impact is accelerating at a much faster pace," Ban said, referring to the ongoing fifth assessment report of the Intergovernmental Panel on Climate Change. "This is very serious and alarming. That is why I have been …