Learn Italian: Oggi lo sviluppo di questa zona non è più bloccato. - Today the development of this area is no longer blocked.

It translates to "no longer" or "not anymore." In Italian, you place these words around the verb. You put non before the verb (è) and più right after it, creating non è più (is no longer).

Why is the article lo used in lo sviluppo instead of il?

Because the masculine noun sviluppo starts with an s followed by another consonant (v). Masculine words starting with this s plus consonant combination always take lo instead of il.

Zona is feminine, so why does bloccato end in the masculine -o?

Because bloccato (blocked) describes lo sviluppo (the development), which is masculine. Even though the feminine word zona is closer in the sentence, the thing that is actually blocked is the development, so the adjective must match that masculine singular subject.