Is it clean?

Yulia tells Estrella how to get to Puglia.

...

Yulia: There are two trains. There is the express. It takes an hour. It is expensive.

Estrella: Expensivo. I understand.

Yulia: Then there is another train. It too takes an hour. But it is half the cost.

Estrella: Cheapo I like. But it is dangerous? No?

Yulia: No. It is half the cost, it is speedy too. There are few accidents.

Estrella: I mean, the people on it. They are dangerous?

Yulia: No, they may be more economical, but they are not dangerous.

Estrella: Then is it clean?

Yulia: It is clean.

...