In June 2007, the United Nations Climate Change Panel published the three-part UN Climate Report, which had involved some 2,500 researchers from 124 countries over the years. Among other things, it is based on around 40 computer simulations. For the first time, people agreed on a formulation according to which humans are to blame for climate change (which is still contested in some places to this day). The highly developed countries are responsible for the warming of the atmosphere (global warming) and the "export" of the effects. The main causes are rapid population growth, increasing consumption of fossil fuels, deforestation of forests and urbanization.
By ruthless burning of fossil fuels such as gasoline, oil or coal, huge amounts of additional, so-called greenhouse effect causing carbon dioxide.