Abstract

Present Climate Change is a result of human activity. It has been provoked by rise of CO₂ concentration in the atmosphere. That hinders removal of excess heat into space. CO₂ is the universal product of carbon oxidation and specifically the by-product of industrial energy production from fossil carbon, coal, oil and gas. It cannot be completely replaced from the atmosphere because it enables the climate that man can inhabit the Earth. Moreover, it is the starting material for plant growth. Biotechnology can handle CO₂ and suppress Climate Change. Basic process for this is the phototrophic reaction of the carbon cycle. Its products are semi-oxidized organic compounds and O₂. The semi-oxidized compounds are subject to aerobic and anaerobic reactions in this cycle delivering energy for further life forms including humans as well as for human’s technique. The anaerobic part needs mechanical transport of the reactants to locations where anaerobic conditions prevail and vice versa. Natural events as well as human activity perform these material movements. Phototrophy, aerobiosis and anaerobiosis make the complete carbon cycle. Products are hydrocarbons, semi-oxidized organic substances and CO₂. In the atmosphere CO₂ has the property of a trace gas. When it reaches certain excess Climate Change occurs. To avoid that the CO₂ concentration must be held in subcritical ranges for Climate Change but high enough to let not cool the surface of the Earth too much and also for feeding undisturbedly the plant world. The CO₂ concentration in the atmosphere, cco₂, must be held on one proper level to cover three needs, avoidance of Climate Change by unwanted rising temperatures of the Earth surface, avoidance of the contrary effect of unwanted cooling the Earth surface and avoidance of disturbing plant growth. Methods can be of different origin, however principally regarding the needs of climate stability. Among them are use of carbon-free materials and energies for usable energy production, storing CO₂ and CO₂-resulting biomass in the subsoil and production of usable energy by recycling the carbon of CO₂ into energy-delivering materials. For the latter the full carbon cycle is needed. Its phototrophic reaction brings energy into the carbonaceous substances resulting in semi-oxidized compounds. The aerobic processes occur at the surface of the Earth delivering their energy-containing substances into living organisms being used there by oxidation to CO₂. The anaerobic processes occur in absence of molecular oxygen artificially at the surface in apparatuses and naturally in the subsoil of the Earth. There, the semi-oxidized carbon compounds are turned by disproportionation reactions into hydrocarbons and CO₂. These hydrocarbons are the end products of the anaerobic part of the carbon cycle. If they should be integrated again into the aerobic processing they must be transported mechanically into the atmosphere to meet molecular oxygen. The energy of these hydrocarbons can be qualified as machine-friendly compared to that of the semi oxidized compounds which contain less energy and can be defined as organism-friendly. Thus, the full carbon cycle is able to provide energy for technique and nature. If the CO₂ comes from fossil sources Climate Change can occur. If the CO₂ comes from biomasses Climate Change will not occur. It is advisable to introduce a world-wide institution to control CO₂ and CO₂-delivering substances in the atmosphere, at the surface of the Earth and in the subsoil.