For 20 years, I`ve lived in a big city. Since I`m 20 years old simply put, I`ve never lived in a country side. So I believe that I know everything about a big city - its advantages and also its demerits. Some examples of the demerits are traffic jam, noise pollution, environmental pollution. When I was 17, I had a chance to go on a vacation to Canada for a month and I stayed with one Canadian family who lived in a rural district. I had a great time there. The air was so clean, no traffic jam, always quiet and peaceful. But if someone ask me `Do you want to live in a country side instead of living in a big city?`, my answer would be `No`. In spite of all the defects, I would rather live in a big city for these reasons - big city is more convenient, it is a seat of learning, and the place is safe from accidents.