Smooth growth of the average temperatures and the related spread of invasive plant species have already caused an increase in allergies in the temperate latitudes of the Earth and will lead To even greater consequences in the future, according to environmentalists, who published a publication in the journal Further increase of the average temperatures and global warming will not only lead To the extinction of the polar caps, rising sea levels and weather changes, but also To a number of unpleasant effects. For example, in January this year, scientists have found that the conversion of ecosystems in the sea will lead To an epidemic of parasites that infect fish and other seafood. A group of European ecologists, as well as among them the citizen of Russia Dmitry Khvorostyanov from the Institute of atmospheric physics Russian Academy of Sciences, has analyzed the magnitude of yet another climate problem - the spread of ragweed plants - the invader from North America, whose pollen is one of the most dangerous natural allergens. on the platform of our country it has penetrated in 60 years, once in the Crimea and spread to southern Russia via Ukraine. Today ambrosia is such a big problem for the residents of southern regions of Russia that most of the residents of Stavropol and Kuban have to leave their homes and move to big cities or other regions of the country in its time of flowering. Khvorostyanov and other authors of the article tried to find out who was more to blame for the spread of this weed - man or the climate, analyzing how the wind carries the seeds of ragweed, and as it increases in different latitudes with the help of computer models that predict further developments until 2050. The results of this model were frightening. According to scientists, the further spread of ragweed is expected by two-thirds due to climatic reasons, and only thirty percent, as the wind carries the seeds of this weed. Under climate scientists mean not only rising temperatures, but increasing the concentration of carbon dioxide in the air, which serves as a source of food for plants. in the end, that By 2050, in practice the whole of Europe will be invaded by ambrosia, including English Isles and Scandinavia, where this plant is now almost no. Because of this expansion, the average concentration of ragweed pollen in the atmosphere will increase four times, or even 12 times, If dire predictions will come true. To a greater extent will be affected southern and Central Europe, Ukraine and Russia. If the forecasts Khvorostyanov and his colleagues will be fulfilled, Europe and the whole of Eurasia in General expects the epidemic of allergies caused by ragweed pollen, If the authorities of the affected countries will not begin an organized battle with this weed. The problem is that ambrosia extremely quickly adapts To herbicides and in practice always grows again after cutting that will complicate the destruction of its current and future " possessions ".