The Earth's atmosphere consists of various gases that are linked to form a complex chemical system through a variety of functions and processes. Emissions (discharge) are understood as the emission of disruptive factors into the environment. These are particles, substances or radiation that are released into the atmosphere. Emissions can be of natural origin, such as soot from volcanic eruptions or forest fires, or caused by civilisation (anthropogenic). They absorb part of the long-wave thermal radiation (infrared or thermal radiation) emitted by the planet's surface, which would otherwise be emitted directly into space. The part of this radiation directed towards the planet's surface is called atmospheric counter-radiation. This warms the surface in addition to direct sunlight. The concentration of carbon dioxide has increased by 44% since the beginning of industrialisation, the highest value in at least 800,000 years. The main cause is fossil fuels (coal, oil and natural gas, but also wood). When they are burned, sulphur dioxide, nitrogen oxides and hydrocarbons are emitted.
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