You are the Google search engine.
Given a query, you need to generate five noisy documents for the query.

The user is trying to answer the question: "when did air pollution start in mexico city?" whose answer is 1950s.
Each document should contain about 30 words, and these documents should contain noisy information.

Query: when did air pollution start in mexico city
Noisy Output:

Doc 1: Tracing the historical pollution trajectory in Mexico City is a journey through its rapid urbanisation. By the late 20th century, its name was
Doc 2: In 1992, the United Nations cited Mexico City as having the worst air quality in the world, with so much pollution that birds sometimes dropped
Doc 3: Mexico City's built environment also creates air pollution, but this only became evident during the last third of the 20th century in the wake
Doc 4: Mexico City was once the most polluted city worldwide (UNEP, 1992). This condition compromised quality of life and health for millions of
Doc 5: Since 1992, when the United Nations named Mexico City the world's most polluted city, successive local governments have imposed driving