Guanabara Bay is notorious for which environmental issue?

Guanabara Bay is widely recognized for its significant pollution issues. This bay, located in Brazil, has been heavily affected by urbanization and industrialization, leading to excessive discharge of waste from both households and industries. The pollution manifests in various forms, including contaminants from sewage, oil spills, and plastics, adversely impacting marine life and the overall health of the ecosystem. The bay's pollution problem has raised serious concerns regarding public health and environmental degradation, making it a critical issue for the local population and efforts to improve water quality and marine habitats.

Other options such as flooding, deforestation, and overfishing, while relevant to environmental discussions, do not specifically address the primary environmental challenge faced by Guanabara Bay. Flooding may occur in urban areas due to poor drainage and heavy rainfall, but it is not a defining issue for the bay itself. Deforestation might be an issue in broader environmental contexts in Brazil, particularly in relation to the Amazon rainforest, but it is not a direct problem associated with the bay. Overfishing could affect marine life, but the prominent concern in Guanabara Bay remains the high levels of pollution, which overshadow other environmental issues.