Problem-Solution: Air Pollution in Vietnam Air pollution has become a critical environmental issue in Vietnam, particularly in major cities like Hanoi and Ho Chi Minh City. This problem stems primarily from heavy traffic emissions and industrial activities, leading to severe health risks for citizens. To address this, several solutions should be implemented. First, the government should invest in public transportation and encourage people to use buses or electric vehicles instead of motorbikes. This would significantly reduce the amount of exhaust fumes released into the atmosphere. Second, stricter regulations on industrial waste are essential. Factories must be relocated away from residential areas and equipped with advanced filtration systems. Lastly, raising public awareness about planting more trees can help improve air quality naturally. In conclusion, while air pollution is a serious threat, it can be mitigated through the combination of government action and individual efforts. Taking these steps now will ensure a healthier environment for future generations.

Question 1: This app allows you to review lessons by playing games. Question 2: We were cleaning up the beach when it started to rain. Question 3: Ecotourism provides tourists with opportunities to explore nature.