Global warming is the increase in the average temperature of earth's temperature and the changes in climate.global warming is the one of the severe problem facing by our whole world.production of carbon di oxide and green house gases are the reasons for increase in global warming.this global warming effects the human life.because of global warming seasons are not coming properly time to time.global warming effects the ozone layer which stops dangerous rays from sun light.when ozone layer is effected we directly get the heat from sun so will get more temperatures in summer. mainly global warming is caused due to the cutting of forests. tress give us more air and coolness but when cut those tress we will don't have sufficient air. we will get the oxygen from trees which is necessary for for breathing . so by cutting tress we are not getting sufficient oxygen. because of factories and industries carbon di oxide gas is released more which pollutes the air.global warming is also caused cue to pollution. pollution is mainly of 4 types they are water pollution, soil pollution, air pollution,noise pollution.because of water pollution we are not getting sufficient water for drinking.water pollution is caused due to factories releasing waste material into water resources so the water there will be polluted and the water living animals will also die and when we eat those fishes we will get health problems.