These are Asia’s 22 greenest metropolises!



18. Hanoi

Hanoi, Vietnam’s 1,000-year-old capital city is home to 6.5 million people. Its economy, which has grown rapidly over the past decade, accounts for around 13% of Vietnam’s GDP.

Hanoi ranks below average overall in the index. The city’s best results are in the energy and CO2, air quality, and waste categories.

Particular strengths in these categories include relatively low estimated CO2 emissions, a high rate of electricity generated from hydropower, and efforts to set and monitor standards to combat air pollution.