That's not true Theland
http://www.ncdc.noaa.gov/paleo/globalwarming/m edieval.html
Temperature changes are cyclic but this one is different.
This time the Sun's output has dropped and the temperature has not dropped with it.
We're not however looking at a scorched Earth or "Day after Tomorrow" but in the next 50 years we'll see some significant changes.
The biggest effects will be felt in places like Africa and Bangladesh.
If you think immigration forces are bad now, wait 50 years and see what it's like.
I predict nothing like enough will be done, 3rd world countries will feel the brunt and we'll start to errect a wall around Europe like that the Israeliis have built.