Seyed Reza Samaei - Post-doctoral, Lecturer of Technical and Engineering Faculty, Science and Research Branch, Islamic Azad University, Tehran, Iran.
Madjid Ghodsi Hassanabad - Associate Professor, Department of Marine industries, Science and Research Branch, Islamic Azad University, Tehran, Iran.

A wide range of policies, strategies, and interventions have been implemented to improve air quality all over the world. This systematic review comprehensively appraises the policies and strategies on air pollutants controls enacted in different countries, worldwide. Air pollution is a serious challenge for cities and communities and needsserious attention from city managers, environmental organizations industry, and ordinary people. Extensive and coordinated actions by all these institutions and people can lead to improving air quality and maintaining people's health This article examines the air pollution situation in big cities and proposes solutions to reduce and address theseproblems. This pollution is often attributed to factors such as traffic, industry, and waste management. To tackle this challenge, the article emphasizes the promotion of public transportation, the use of renewable energy, sustainable urban planning measures, optimal traffic management, and improved waste management. Through effectivecollaboration between the government, society, and industry, these solutions can enhance the air quality of cities and safeguard the health and well-being of citizens .

Air pollution, large cities, Renewable energy, Waste management, Traffic.