因為是城市的關係，所以人口會非常多，空氣品質也會不好

因為是城市的關係，所以人口會非常多，空氣品質也會不好

結果 (英文) 1:

Because it is a city, the population will be very large and the air quality will be poor.

結果 (英文) 2:

Because of the city, there will be a large population and poor air quality

結果 (英文) 3:

Because it's a city relationship, it's going to be very large and the air quality is going to be bad