The book involves the adsorption process of gaseous pollutant i.e. SO2 and NO2 using activated carbon to adsorb where the activated carbon is gotten from alligator pepper shell. It involves the explanation of the collection, preparation, and characterization of alligator pepper shell and it was done. The preparation was done in raw uncarbonized to carbonized material.The collection, preparation, and characterization of alligator pepper shell were done. The preparation was done in raw uncarbonized to carbonized material. The alligator pepper used was gotten from Oja Oba market Ilorin, Kwara State, Nigeria. The samples were washed and sun-dried for 12 hours, pestle and mortal was used to grind it and was sieved through a 2ml particle-sized meshed sieve.