Is the climate changing? I guess, everybody has noticed over a few last years that the climate and the weather are not stable and sometimes change quite unsustainably. For example, in Moscow area a few days ago, there was severe frost with a temperature below - 30 degrees Celsius, but now the weather is much friendlier and the temperature is already close to zero. Such more than just significant variations not only causes anxiety due to its probably negative influence on people's health, but it is also an interesting question for science. Indeed, what does this change mean? Where are causes of it, why do we face such weather anomalies in the present? Furthermore, for last years, disasters have appeared in different corners of the world: tsunami in Asia, floods in Europe, hurricanes in the USA, etc. These and other questions more often arise in the society awakening fear about the future of our planet in some groups of people - scientists, politicians and ordinary citizens. One theory, which I heard about, argues that such natural phenomena may be related to negative humanity influence, for example, impact of industry, transport. However, what if we are innocent, and all these climate problems happen regularly over certain periods as part of global world's cycle due to natural process. I have heard about the little ice period in the medieval, and maybe currently we have a similar thing? Anyway, today we have some global issues to think about instead of being obsessed with a military race and the ridiculous media war.