???It has been discovered that the concentration and the amount of greenhouse gases in the atmosphere have been rised and the CO2 has become thicker. In Antarctica, snowfall cannot melt due to low temperatures. The accumulated snowfall will retain some bubbles in it. Scientists drilled and sampled ice cores of different depths, extracted the air bubbles, analyzed the gas components, and conducted isotope dating to obtain information on changes in various components of the atmosphere in different historical periods of the Earth. According to the available ice core data, the concentration of greenhouse gases such as carbon dioxide, methane, and nitrogen oxides in the Earth’s atmosphere is now the highest in nearly 800,000 years.

??The results of the direct measurement of the atmosphere show that the carbon dioxide concentration in the earth’s surface atmosphere has now exceeded 380 ppm (that is, 380 parts of carbon dioxide in a million parts of the volume), and the rising atmospheric greenhouse gases will inevitably increase the greenhouse effect and make the climate warming.
??Until now, there are skeptics who do not believe in the reliability of scientific data on climate change. However, the very fact that the climate is changing does not deny any scientist. The increase in the mean temperatures of the Earth is confirmed by data from direct meteorological measurements, regular statistics over the past 150 years , a variety of methodologies and approaches to climate assessment. Now it is reliably proven how the chemical composition of the atmosphere changed over the last 160 thousand years. This information was obtained on the basis of the analysis of air bubbles in glacial cores extracted from a depth of up to 2 km at Vostok station in Antarctica and Greenland. It was found that in warm periods the concentration of CO 2 and CH 4were approximately 1.5 times higher than in the cold glacial periods. These results confirm the suggestion made back in 1861 by J. Tyndall that the history of the Earth’s climate change can be explained by changes in the concentration of carbon dioxide in the atmosphere. According to data from a wide variety of sources, the 20th century has become record warm over the last thousand years .
Modern statistics say that over the past twenty years, floods, hurricanes, tsunamis, landslides and other natural disasters began to occur on our planet four times more often . Scientists and researchers have established that there is a direct correlation between global warming and the increase in the number of natural disasters and natural disasters on our planet. If in the 80 years in the world there were about 120 natural disasters annually, then today the number of natural disasters is already about 500 cases per year. The climate change that is happening now does not fit into natural cycles at all, and moreover it is extremely rapid . Now we are talking not about the millennia, but about hundreds and even dozens of years.

??Some species are facing extinction
??Scientists have discovered that more and more changes are taking place in ecosystems. Under the influence of climate change, biological and ecological systems are undergoing many changes.

??The developmental rhythms and phenology of organisms have shown significant changes, such as the advancement of the leaf spreading period of plants, the early flowering period, the postponement of the yellowish and deciduous period, the prolongation of the growing season, and the change of migratory animal migration time.

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