Cause and solution of air pollution

it is true that air pollution in our country is a significant problem nowadays. The main reason for this is that the traffic in the city is very complicated. People are likely to use more vehicles such as car, motorbike and so on, which makes a high level of air pollution because of exhaust from engine, chimney of these. The result of this is that the atmosphere in city is more and more polluted and harmful to health's citizens. There are several actions that governments could be take to solve this problem. Firstly, they should plant more trees in city center because this activity helps keep the air more fresh. Secondly, society should use more public transports such as bus, bike instead of car or motorbike. And finally, community could use energy saving device and clean energy, especially solar. It is a easy measures for everybody to protect air and save money