Green chemistry is the ultimate goal to achieve and most effective way of protecting the environment, atomic economy is the basic principle of Green chemistry, which eliminates the source of waste.

   

      5R illustrates most important aspects of green chemistry and its practice.
1. Reduction:Reduce the use of raw materials, reduce the waste discharge by atomic economy.
2. Reuse:Reuse catalysts, solvents, carriers as much as possible.
3. Recycling:use recycled substances,save on cost, reduce wastes.
4. Rejection:Reject use of hazardous and toxic substance, use replacement with green properties, less toxic, less environmental hazardous.
5. Regeneration:Use renewable resources,biodegradable, reduce environmental impact.