Air in Delhi is usually unhealthy in winter due to pollution.
The air in Delhi is usually unhealthy in winter due to pollution.
How does adding the definite article affect the sentence? What is the difference between these two sentences?
I do know how the definite article is used, but this is a unique case. In my opinion, since we are talking about specific air, i.e., the air of Delhi, we might use a definite article. But I also believe we don't need the definite article there because we have already mentioned the city name and have already made it specific. I am confused.