Human activities affect the change of climate There have been various changes in the climate. Extreme events such as the Nashville flood which is described by officials as a once-in-a-millennium occurrence are happening more often than they used to be. Human-made shift in climate and purely natural factors may conspire those events. Whereas in the past, extreme events was a relatively rare occurrence, in recent times it has become quite commonplace. The anthropogenic factors may play a major role. Of most concern in these anthropogenic factors is the increase in CO2 levels due to emissions from fossil fuel combustion, followed by aerosols and cement manufacture. Other factors, including land use, ozone depletion, animal agriculture and deforestation, are also of concern in the roles they play - both separately and in conjunction with other factors - in affecting climate and measures of it variables. According to a number of surveys the Earth is becoming increasingly warm in past years. This is also expressed as global warming. The human activities such as burning fossil fuels have increased abundance of small particles in the atmosphere. These particles can change the amount of energy that they absorb and reflect (Hamburg et al. 2012). In consequence the concentration of particles makes it difficult for the reflected solar energy to radiate. Beyond that, the gas produced by burning fossil fuels such as carbon dioxide and methane is widely considered as the major factor of the global warming. Moreover the farming and exploitation in land makes the surface of the ground so fragile that the soil erosion becomes easier. The less soil and deforestation thin out the trees enough to assimilate the greenhouse gas. Therefore the human activities lead to the warm climate to a significant extent. As the accessory substance of global warming various extreme events