How Climate Change Could Cause Massive Global Migration

In the next 50 years, more than a million climate migrants could
come to the United States from Central America if nothing is done
to curb carbon emissions. That’s according to a new model that
predicts where refugees from regions decimated by decreased crop
productivity, water shortages and rising sea levels may move. 
The model, developed by ProPublica and The New York Times Magazine,
finds that climate change will likely cause “the greatest wave of
global migration the world has seen.”  Forum talks with
ProPublica environmental reporter Abrahm Lustgarten about future
climate migration and the experiences of those who have already
left their homes because of the changes caused by a warming planet.