Hanoi is one of the cities with the highest smoke and dust in the world. Air pollution is being warned. So what are the causes of air pollution here? As we all know, Hanoi is one of the cities with the most developed economy in Vietnam. Here one day there are many vehicles and machines operating. The works piled up everywhere. One day, the emissions from vehicles and machines are huge. Places where air is polluted often have dense dust. Like soil and water pollution, air pollution will have direct negative effects on human health. People who live too long in polluted areas without any protection are more susceptible to respiratory illnesses. To quickly overcome the consequences of air pollution, people and responsible agencies need to take correct and timely measures. We can use electric vehicles instead of gasoline today. Many car manufacturers have produced vehicles that help save fuel and protect the environment very well. At the same time, we also need to protect ourselves by wearing a mask when we leave the house. In the home, the agency can use air purifiers to help keep the air fresh and cleaner, ensuring health for everyone. Together we will strive for a cleaner and healthier atmosphere.