HoangQuyHa

A brief introduction to Ottawa, Canada, highlighting its architecture, art, history, tourist attractions, traditional dishes, and the Spring festival.

A brief introduction to air pollution, its causes, effects, and ways to reduce it.

Ha talks about his hobbies, health activities, community service, Vietnamese food and drink, traffic safety, films, future of transportation, sources of energy, festivals around the world, music and art, overcrowding in the world, and the first university in Vietnam.