Atom economy: The design of the synthesis of the product should be such that all the chemicals/materials used in the process gets converted into products to the maximum extent. It is common observation that most of the organic reactions release undesired products along with the useful product. The unutilized material is considered as waste which causes trouble and the process becomes uneconomical. Green chemistry requires that new processes should be designed such that the most of starting material gets converted into product. This is called as maximizing atom economy