Jabberwalker Jabberwalker:
This could eventually lead to a military threat to our southern borders when the great corn and grain growing Midwest dries up and becomes desert. The Great aquifer underneath it is gradually disappearing and what is left is becoming toxic from surface pesticides and petroleum residues percolating down. A hungry, thirsty (and well armed!!) American population ... one that has traditionally felt "exceptional" .. poses a long term strategic threat to this country. It won't happen in my lifetime ... probably not in my children's lifetime, but my grandchildren may easily have to deal with invasion or annexation from a Southern neighbour who has a long history of this sort of behaviour.
I suppose it's a vague possibility, but the reality is that given the massive size of the USA (population, wealth, military, etc), if they decide to take us over, it won't really matter what we do - there's simply too many of them and too few of us.
However, I'd like to think that Canada and the USA would be able to negotiate a reasonable solution (like shipping water south via pipeline or something) instead of going to war.
No, the main point of this article is that climate change will increase the likelihood of conflict in Africa, the Middle East and Central Asia (to name a few places) as glaciers/rivers/lakes dry up and water sources disappear.