the greenhouse effect is not a new concept in 1863 irish born scientist john tyndall was writing about gases and some 30 years later swedish svante arrehenius made first known attempt to calculate impact of increased carbon dioxide earth s atmosphere today there no question existence without it our planet would be vastly colder by 33 c on average present life forms very different water vapour main gas accounting for three quarters nothing we do likely change much but human activity particularly since beginning industrial revolution turning up heat causing changes which will dramatically affect climate environment major source burning fossil fuels provide energy electricity each year well over 25 billion tonnes are put into this only 3 natural flux between oceans or land its balance critical responsible 60 induced global
