This thread discusses the Content article: what is global warming

the gases which are released to atmosphere by people cause greenhouse effect and this results in an increase on the surface of world's heat.we call this global warming. if it is necessary to explain more clear , the surface of world is being heated by sun rays. World reflects sun rays back again to atmosphere. But some rays are kept by a natural vegetation which consists of water vapour,carbon dioxide and marsh gas. this provides earth surface to remain sufficient warmth. But recent years there has been an increase in population ,inclination for consume in public, the burning of fossil fuels and deforestation. those result in methane gas and (diazot mono oksit) being piled up more in atmosphere.according to scientist , this results in global warming. the records which have been kept since 1860 show that the average of global warming increased between 0.5 and 0.8 degree. scientist are in the view of that the increase of heat affects people's life remarkably. besides we are approaching the point which is beyond retrieve . if some measures arent taken, at the end of this century it is estimated that there will be increase in heat average of 2 degree. there is a foresight that 2007 will become the most warmth year according to the records which have been kept for 150 years. well ,what does this heat increase (namely global warming) make way for ? , how does it affect our lifes ? the effects of global warming which cause changes in climate system are sensing everywhere in the world from the highest peaks to the depth oceans and from ecuador to poles. glaciers in poles are melting,the level of sea water are raising and the lost of soil in shores are increasing. for example : from the late of 1960s to nowadays , there have been %10 decrease in north pole's blanket of snow. it was fixed that there was an increase in the level of sea between 10-25 cm during twentieth century. in relevant with global warming , while in some part of the world the violence and the permanence of hurricane and flooding are increasing , in other countries desertification has influence acutely in long times. there is a warmth increase in winter , spring comes early , fall is delayed., the period of animal's migration changes. namely climates change . the species of the animal and the plant which cant stand this climate changes are either decreasing or becoming extinct. global warming also effects human health directly. scientists are in view of that the changes in climate will trigger illnesses like heart disease, respiratory disease, alergic, infectious and some other diseases.