RIO DE JANEIRO — In November, an undersea leak at the Frade field operated by Chevron spewed 3,000 barrels about 230 miles off northeast Rio state, shaking the sense of security that Brazil’s regulators had about producing oil off this picturesque coast.

An aerial view of vessels in the cleanup of an oil spill in an offshore field operated by Chevron at the Bacia de Campos, in Rio de Janeiro. (Rogerio Santana/AP)

As Brazil increasingly banks its energy future on oil, accelerating the spending of $224 billion in a bid to double oil production by decade’s end, it is increasingly clear that the very nature of Brazil’s ambitions means heightened hazards.

Here's my audio report on how Brazil’s attitude toward oil has changed — from celebrating the discovery of oil reserves as if its soccer team had won the World Cup, to starting to think about the hazards of drilling:

Read the full story here.

A supply boat works around an oil spill at the Frade field located in the Atlantic Ocean northeast of Rio de Janeiro, on Nov. 18, 2011. (Marcia Foletto/AFP/Getty Images)

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