I’m not 100% sure if this is a scientific theory but I’m going with the big bang theory. The big bang theory is a scientist best guess on how the world came to be. A 2013 map of the background radiation left over from the Big Bang, taken by the ESA's Planck spacecraft, captured the oldest light in the universe. This information helps astronomers determine the age of the universe.
        
             
        
        
        
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Carbohydrates monomer is polymer made up of monomers called monosaccharides.
        
             
        
        
        
Trees can be made again . Water is a natural resource fuel is too . Wind