Breakdown of En el centro casi nunca respiras aire puro.
en
in / on / by (means of transport) / about (after pensar)
el centro
the center
el aire
the air
casi nunca
almost never
Questions & Answers about En el centro casi nunca respiras aire puro.
Why isn't there a no before the verb here?
Is respiras talking to a specific person?
It can, but here it acts as a general 'you'. Just like in English, Spanish often uses the informal tú form to mean 'people in general' or 'one'.
Why is 'downtown' translated as el centro?
El centro literally translates to 'the center' (the city center). In Spain, this is the standard way to refer to the downtown area of a city.