Emigration from Central America has increased in recent decades, due to economic hardship, violence, and, in a growing trend, as a result of environmental disasters such as persistent drought. — By Michael Sutherland While sea level rise poses a threat to all coastal states, and temperature rise has and will continue to contribute to changing ecosystems, in this tropical zone the major threat from climate change is in “global weirding”, the increasing frequency and severity of extreme weather events, including…