Immigration Driven by Global Warming

Years back, some experts concluded that what started the civil war in Syria was global warming. The crops failed. The farmers sought help. The government did not respond, and the war began. The experts predicted that global warming would soon trigger huge, worldwide migrations and social unrest.

Now we've had crop failures in Central America, and the people there have started walking north, in the direction of food. 

As global warming worsens, more of the South will start moving north, crossing lines on maps in Europe and in North America. 
We can make ourselves useful by accepting immigrants and by funding Central Americans to find new ways to grow food crops. This would be in the best interest of everyone.