By-Product

 A by-product is an optional item gotten from a creation procedure, fabricating procedure or compound response; it isn't the essential item or administration being delivered. A by-product can be valuable and attractive or it very well may be viewed as waste: for instance, grain, which is a side-effect of the processing of wheat into refined flour, is here and there treated the soil or consumed for removal, however in different cases, it tends to be utilized as a nutritious fixing in human food or creature feed in By-product. Gas was previously a side-effect of oil refining that later turned into an alluring ware as engine fuel. The plastic utilized in plastic shopping sacks additionally began as a side-effect of oil refining.