The port of Buenos Aires has developed several programs and certificates to encourage a proactive environmental behavior in port companies and vessels calling at their harbor. One example is the program for residues management, to promote an efficient use of materials, promote reuse and reduce toxic garbage. Another example is the energy efficiency program offering discounts to green vessels, with positive scores in the Environmental Shipping Index. Until 2019, 296 ships have already benefited from this incentives. This initiative has been also implemented in other ports worldwide.