The video discusses the environmental issues at San Bento Beach, where trash and dead fish have accumulated. The pollution is exacerbated by rain and river flow, bringing debris to the area. The fish species affected have low commercial value and are often discarded by fishermen. Sardines, in particular, suffer from oxygen depletion, leading to their death. The incident raises concerns about the environmental state of Guanabara Bay, which is set to host sailing events in the 2016 Olympics.

What environmental issue occurred at San Bento beach after the appearance of dead fish?

• An oil spill

• Garbage accumulation

• A sandstorm

• A chemical leak

What did the environmental study find regarding the water near San Bento beach?

• Increased fish population

• High levels of pollution

• No visual anomalies

• Presence of toxic chemicals

Why do the fish species involved have low commercial value?

• They are too small

• They are often discarded by fishing boats

• They are poisonous

• They are difficult to catch

What is a significant challenge in preparing 'boca torcida' sardines for consumption?

• They require a lot of work to prepare

• They are not tasty

• They are too expensive

• They are illegal to catch

What debate was revived by the incident with the dead fish?

• The introduction of new fishing regulations

• The construction of new fishing boats

• The expansion of San Bento beach

• The use of Guanabara Bay for the 2016 Olympics