Slavery has been illegal in Brazil for more than a century. But as our correspondent Fabio Teixeira discovered, thousands of workers on the country’s huge sugarcane plantations continue to endure forced labour and dangerous working conditions.

At the same time, Brazil’s sugarcane industry has become a major global supplier of ethanol - a biofuel meant to help cut the use of fossil fuels and carbon emissions.

Fabio takes us into the fields where laborers spend the day bent over, hacking away at sugarcane stalks in perilous heat, with a growing number falling sick. And we learn that some of these plantations, with a record of abusive practices, have international clients in the United States and Europe.

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