Learn Spanish (Latin America): No vamos al barrio porque es peligroso. - We do not go to the neighborhood because it is dangerous.

In Spanish, porque (one word, no accent) means "because" and is used to give reasons, just like in this sentence. When you want to ask the question "Why?", you must use por qué (two words, with an accent on the e).

Where are the words for "we" and "it" in this sentence?

Spanish often drops subject pronouns because the verb ending already tells you who is doing the action. vamos means "we go", so nosotros is not needed. For "it is dangerous", Spanish doesn't have a specific subject pronoun for "it", so we simply start right with the verb es.

Why does the sentence use al before barrio?

When the preposition a (to) is followed by the masculine word for "the", el, they always combine to form the contraction al. Since barrio is a masculine noun, we say al barrio instead of saying a el barrio.

Why do we use es instead of está to say the neighborhood is dangerous?

We use es (from the verb ser) because being dangerous is seen as a basic, defining characteristic of this particular neighborhood, rather than just a temporary condition or state.