Reuters: Global warming will pressure sovereign credit ratings throughout this century with poorer, lower-rated countries hardest hit, Standard & Poor's (S&P) Ratings Services said in a report. S&P said climate change will be the 21st Century's second global "mega-trend', after aging populations, to put downward pressure on sovereign ratings, which could harm economic growth and government coffers. The report said extreme weather events such as typhoon Haiyan, which killed more than 5,000 people in the...