according to the forecast, in 2100, the earth temperature will increase from 1.4 to 5.8 celsius. if the earth tempurature increases by 2.5 census, it will result in some serious effects, there will be over 210 people suffer from malaria, 3.1billion people live with short of water, more than 50 people face with famine, even all the gas causing green house origins from human activities which is immediately stopped, the climate effects still lasts within the next 50 years.