ASEAN was established in 1967 to advance regional cooperation, particularly economic, security and social. Its member countries have a combined population of 650 million and GDP of more than $2.5 trillion. Its immense population, comparative advantages and geographical location have led to the bloc being one of the quickest-growing markets globally. Interdependent Southeast Asia is increasingly threatened by environmental degradation and climate change, which would have an immense financial cost and decrease the standard of living in the region…In developing cities, there are rural areas with a lack of facilities and even basic necessities. Governments have to build infrastructure for traveling and also water, electricity, sanitation, and others. ASEAN member countries have begun sustainable development projects: Indonesia is producing environment-friendly vehicles while Vietnam and Myanmar are building huge solar power plants. Collectively, the Smart Green Cities program in collaboration with the European Union seeks to reduce carbon emissions and promote sustainable development in Southeast Asia.