More Mexican migration on the horizon?

Disputes over illegal Mexican immigrants are already heating up in the United States, thanks in part to a new Arizona immigration law.

But global warming could bring the immigration issue to a boiling point in the coming decades, if a new study holds true.

According a new computer model, a total of nearly seven million additional Mexicans could emigrate to the U.S. by 2080 as a result of reduced crop yields brought about by a hotter, drier climate—assuming other factors influencing immigration remain unchanged.