Night Earth

Barretos, São Paulo, Brazil

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Barretos is a city located in the northern region of São Paulo, Brazil. It has an estimated population of 121,000 inhabitants, according to the Brazilian Institute of Geography and Statistics (IBGE). The city is known for its cattle breeding and rodeo events, which attract thousands of visitors every year. However, its night lights have been a source of controversy, as it suffers from light pollution that affects not only its residents but also its natural surroundings.

Light pollution is the excessive and misdirected artificial light that is generated by human activity, such as streetlights, billboards, and building illumination. In Barretos, the main sources of light pollution are street lighting, illuminated signs, and sports facilities. According to a study conducted by the National Institute of Space Research (INPE), the light pollution in Barretos is considered moderate, with an estimated sky brightness of 18.02 magnitudes per square arcsecond.

The main landmarks of Barretos that contribute to light pollution are the rodeo arena and the airport. The arena, known as the "Barretão," is one of the largest in the world and hosts several rodeo events throughout the year. The lighting system of the arena is very powerful and can be seen from miles away. Similarly, the airport has a runway lighting system that generates a considerable amount of light pollution. Additionally, the city's urban landscape is characterized by illuminated signs and billboards that add to the overall light pollution.

The habits of the people living in Barretos also contribute to light pollution. Many residents leave their outdoor lights on throughout the night, even when they are not at home. This behavior is particularly common in residential areas, where the use of outdoor lighting is seen as a security measure. Similarly, commercial establishments often leave their lights on during the night, even when they are closed, as a way of advertising their presence.

The city's industry also plays a significant role in light pollution. Barretos has a large industrial park that houses several companies, including food processing, metalworking, and chemical production. These companies have large illuminated areas that operate 24 hours a day, generating a significant amount of light pollution.

The impact of light pollution on the environment and human health is a growing concern. In Barretos, the excessive and misdirected artificial light can disrupt the natural behavior of animals, such as birds and insects, and affect their breeding patterns. Additionally, light pollution can have negative effects on human health, such as disrupting sleep patterns and increasing the risk of cancer.

Barretos is a city in São Paulo, Brazil, that suffers from moderate light pollution caused by street lighting, illuminated signs, and sports facilities. Its landmarks, such as the rodeo arena and the airport, contribute significantly to light pollution, as do the habits of the people living there and the city's industry. The estimated sky brightness in Barretos is 18.02 magnitudes per square arcsecond, which is considered moderate. Light pollution is a growing concern due to its impact on the environment and human health, and measures must be taken to reduce it in Barretos and other cities around the world.