Reuters: Climate change will aggravate natural disasters and people in developing nations such as Dominica, Vanuatu, Myanmar and Guatemala are most at risk, a U.N.-backed study showed Thursday. It urged governments to invest hundreds of billions of dollars to curb mounting impacts of hazards such as cyclones, floods, droughts, landslides, earthquakes and tsunamis. “Risk is … felt most acutely by people living in poor rural areas and slums,” U.N. Secretary-General Ban Ki-moon wrote in …