While there has been a lot of anguish about earth warming up some, The History Channel has a program that may give you a different perspective... what might happen if temperatures dropped 1-2°.
The episode is called "Mega Freeze" and was first aired in 2006.
If you get a chance to see it, do so. You'll see what happened the last time the sunspot activity went into a protracted quiet period.
The one part of the show that was a bit controversial was the conjecture of what might happen if the Gulf Stream was disrupted by global warming... conjecture that has been pretty well discredited... to trigger a new ice age.
Life was a lot more like this...
Than this...
The interesting thing about this show was that it used actual history to show what would happen with a drop in temperatures, but used a great amount of conjecture about what would/might happen if temperatures increased a few degrees.
I guess that's expected because we haven't really had warmer temperatures for a few thousand years... so no one really knows what would happen... except that human population and range increased tremendously the last time earth was warmer...