I tell anyone I meet to seriously consider what immigration will be like when anthropogenic global warming will get stronger. I'm neither pro/against immigration but I know many people are scared by immigration (as is demonstrated in many EC countries by the progression of far right parties).

I also tell them to remember that food prices and insurances prices will inevitably go up.

And I won't much more that that because everything else fails (even the death of 1000 persons in my country during this years heat waves just make people say "bah, that's life")