Summer and early fall of 2012 were unprecedented hot.
In 1000 Norwegian explorer Eric the Red discovered and conquered Greenland (Green Land), it was covered with vegetation. After the little ice age vegetation from its trace remains.
Greenland may soon be covered with vegetation, and Spain, Italy, Greece, Turkey Sands.
Last month was the warmest month in the world for 133-year history of meteorological observations.
The summer and early autumn are unparalleled hot in Bulgaria.
Global average surface temperature of the earth in September was by 0.67 degrees Celsius higher than the long-term average temperature for the entire 20th century, the researchers said. Record heat in September `2012 were registered in East Siberia, Venezuela, Guyana, northern Brazil. Warmer than average was virtually throughout South America, in Western Australia, Central and Eastern Europe.
During the Roman Empire and early Middle Ages, the temperature conditions were relatively mild, which favored the economy and the population gradually increased.
From the fourteenth to the early nineteenth century in the Northern Hemisphere cooling observed significantly lower glacial period of weak solar activity.