It has long been known that greenhouse gases contribute to global warming. In 1827, Jean-Baptiste Fourier suggested that greenhouse gases kept the earth warmer, whilst in 1938 an Engineer, Guy Stewart Callendar predicted that doubling the concentration of carbon dioxide from fossil fuel burning would lead to a global increase of 2 °C, with the poles warming more.
People exist always only in combination with nature, they can not be separated from it by any means and thus any kind of changes either positive or negative are always reflected in our lives. Long time ago one of the main problems on the planet became the global climate change. The Artic ice starts to melt and disappear, Latin America and South America suffer from lethal storms and floods. Europeans have to face melting glaciers, forest fires and heat waves. The tree rings and ancient coral in ice cores show that the world has not been as warm before as it is now. The warmest years were all starting since 1998.