Air pollution is a common problem in port areas. Air pollutions comes from a wide spectrum of sources; i.e. exhaust fumes of sailing ships, idle running ship generators when at berth, Ship exhausts, terminal traffic and equipment using combustion engines, dust from bulk cargo handling. A variety of technical solutions are available to reduce those emissions. To stimulate use of such solutions the port authority, can initiate incentive programs or regulatory frameworks. Such programs of frameworks can for instance push for retrofitting filters or cleaner engines, physical barriers at conveyor belts, use of onshore power supply for ships at berths. Such incentives or regulatory constraints can be built in in the tariff system for port dues or in terminal lease contracts. The Port of Los Angeles provides an example of such application through its Examples of such application Technology Advancement Programme.