Reuters: Residents of major world cities cite climate change as the most pressing global issue, except residents of large U.S. cities who list the economy as the bigger problem, according to a survey by HSBC Bank. Climate change topped the list of concerns by some two-thirds of Hong Kong residents polled as well as majorities of residents of London, Paris, Sao Paolo, Toronto, Vancouver and Sydney, according to the poll of 2,044 urban residents around the world. Residents of U.S. cities, …