The Landmark 81 building in Ho Chi Minh City gradually loses its glow during the 2020 Earth Hour. Many buildings on the Nguyen Hue Pedestrian Street in downtown Ho Chi Minh turn off lights during the 2020 Earth Hour. Vietnam is listed among the countries most vulnerable to climate change, according to a report titled “2022 climate change - impact, adaptation and vulnerability,” conducted by the Intergovernmental Panel on Climate Change. Vietnam is listed among the countries most vulnerable to climate change, according to a report titled “2022 climate change - impact, adaptation and vulnerability,” conducted by the Intergovernmental Panel on Climate Change. Young people in Hanoi City show support for the 2019 Earth Hour campaign.