Not at all. We came out of a Little Ice Age starting at around 1650.
http://wattsupwiththat.com/2013/10/30/how-long-before-we-reach-the-catastrophic-2c-warming/
This shows 0.87 degrees in 353 years. So if we drop 0.87 degrees in 350 years, one, it isn't catastrophic, and two you will be quite old by that time.
That theory is based upon some observations made in the past, historical data and computer modeling. It has some credence to it on the surface. There still is a long way to go before there is enough solid evidence. And you will have a hard time convincing politicians and pseudo-scientists of the fact that it is the Sun, not man's actions, that controls Earth's temperature. For they haven't figured out how to tax the Sun.
We have a media that likes to hype everything.
Get a good grip on your long johns, cold weather haters--the worst may be yet to come. That's the long-long-range weather forecast being given out by "climatologists." the people who study very long-term world weather trends…. Washington Post January 11, 1970
You see, we have been through these scares before. The powers that be want you to be scared for it suits their purpose.
Quotes by H.L. Mencken, famous columnist: "The whole aim of practical politics is to keep the populace alarmed — and hence clamorous to be led to safety — by menacing it with an endless series of hobgoblins, all of them imaginary." And, "The urge to save humanity is almost always only a false face for the urge to rule it."
So I wouldn't worry. History has shown, that in my lifetime of 74 years our scientists have switched from too hot to too cold many times. Just look up H. H. Lamb in Wikipedia. Here is part of what is states about him, " He was known as “the ice man” because of his view that global cooling would lead to a future glacial period within 10,000 years with some abrupt cooling phases occurring "within one to two thousand years".[6]:368 However he also acknowledged that global warming could have serious effects within a century."
TSK! TSK! Does that sound rational? Does that sound like it comes from a reasonable man? Or does it come from one who has a hidden agenda, one of fear.
"Fear is the most debilitating of all human emotions. A fearful person will do anything, say anything, accept anything, reject anything, if it makes him feel more secure for his own, his family's or his country's security and safety, whether it actually accomplishes it or not...."
"It works like a charm. A fearful people are the easiest to govern. Their freedom and liberty can be taken away, and they can be convinced to believe that it was done for their own good - to give them security. They can be convinced to give up their liberty - voluntarily."
—Gene E. Franchini, retired Chief Justice of the New Mexico Supreme Court
So don't be manipulated and when you get to 30, go to the refrigerator, take out a beer and toast to the fact that the 'Sagebrush was right'.