This essay will outline some possible reasons for this,as well as suggesting some solutions. First of all,one of the most important factors is the emissions of greenhouse gases.Like,carbon dioxide and methane.They produce from different resources.For example,two important and serious resources are the burning of fossil fuels and gasoline from transportation,so they distribute to the air and become polluted. Another factor is deforestation.If we cut down the trees, the most habitat will dama...