The aim of my report is to, based on the study of interaction of the Life on the Earth's atmosphere, and the evolution of the last on the evolution of the Life on the Earth, to determine the tendency of development of natural conditions on the planet currently and for the foreseeable future period, as abstracting from the effects of human activities on nature, and in reality.
In the initial Earth's atmosphere there was approximately 95% of carbon dioxide (CO2). Currently, however, the earth's atmosphere contains only traces of this gas (0.035%), mainly nitrogen (79% ) and oxygen (21%). 99.965% (400 x 1015 т) of CO2 didn't disappear from our planet's atmosphere causeless and without a trace. Cause is life, the basis of which is carbon. The CO2 cycle in nature was never complete, so for 3.5 billion years the average annual fossilization was over 120 million tones of CO2. Huge amounts of carbonaceous sedimentary rocks are stored in the lithosphere of the Earth.
After its inception, life on Earth has acquired a global character and the fossilization of CO2 in the Archean was not less active than in subsequent geological epochs. Therefore, in Early Proterozoic (2.5 billion years ago), according to the chemical analyses of gas bubble inclusions in quartzite kurumkanskiy Suite of Aldan shield, the atmosphere contained approximately 60% of CO2, others were hydrogen sulfide, ammonia, chlorine compounds, etc.
Two billion years ago in the atmosphere appeared free oxygen (O2). In the Devonian and Carboniferous, when terrestrial vegetation flourished, and when the processes of fossilization of organic matter significantly increased, the O2 content increased significantly. The result was a simultaneous decrease of the CO2 content in the atmosphere that created conditions for rapid evolution of the animal world.
The reverse side of this process was a progressive decrease in temperature on our planet. A series of global ice ages in the Neogene and the Quaternary is mainly due to the loss of Earth their insulation. Currently, the fossilization of CO2 continues. However, further cooling of the planet, if you stop the anthropogenic heat emissions may not be significant, since the concentration of CO2 in the atmosphere could not fall below 0.01% - at this level plants lose the ability to absorb CO2.
At the same time, active volcanoes continuously emit into the atmosphere significant number of CO2. There are other sources of CO2. Therefore, even not taking into account the amount of anthropogenic CO2 emissions, its current number (132.3 x 1012 tons), while maintaining the average value of fossilization 115 x 106 tons per year, can last more than 1 million years. And whereas, along with anthropogenic emissions, the adaptation ability of the plants to changing conditions, including critical decrease in the concentration of CO2 in the atmosphere, we can assume that life on our planet in the foreseeable future is not in danger.
Currently, the amount of CO2 emissions into the atmosphere continuously increases. The question arises, to what level the CO2 concentration is not a problem for humanity. Assuming this value to 0.1%, then the number of 10 x 109 tons of CO2 emissions per year, this level can only be achieved through 260 thousand years.
- Development of carbon life leads to the fossilization of almost the entire volume of CO2 on the planet that has led to a significant cooling of the atmosphere on Earth, but did not prevent the flourishing of life.
- A huge amount of CO2 in the Earth's atmosphere in the Archean, the Proterozoic and the Paleozoic, raises doubts about the reliability of conclusions about the global nature of glaciations in these geological epochs.
- Current levels of anthropogenic emissions of CO2 do not pose a threat to the planet. Moreover, they are timely because of the spontaneous development of life on Earth leads to the gradual disappearance of available CO2 in the atmosphere, that is the basis of life on our planet.
- A slight gain of energy of SYNOPTIC processes in the result of slight warming, do not represent extreme danger for humanity.
- For the Northern regions: Temperate zones and Arctic zones small warming climate favourable for life and economic activities.