The Earth's climate has changed several times throughout history.Deforestation contributes to global warming and leads to carbon dioxide 
remaining in the atmosphere, and as it accumulates, it produces a layer in the 
atmosphere that blocks the radiation coming from the sun.Livestock farming requires large portions of 
land to raise animal herds and grow livestock crops to meet consumer needs.According 
to the National Aeronautics and Space Administration (NASA), there have been 
seven cycles of warming and cooling in the last 650,000 years.The third reason for urbanization is the 
process of removing a large area of land to build more accommodation, 
recreational and agricultural uses.by more than 80%.