This story was produced by Repórter Brasil and co-published with Grist.

Diamond Green Diesel, or DGD, a U.S. leader in renewable diesel production, imports beef tallow from a supplier fed by Brazilian slaughterhouses fined for illegal deforestation. These include a plant that purchased cattle from a rancher described by Brazilian authorities as the “largest destroyer of the Amazon” ever investigated.

Repórter Brasil obtained documents about DGD’s supplier chain and identified, in addition to this case, connections to at least two other slaughterhouses that bought cattle from ranchers fined for practices associated with large-scale illegal deforestation.

These cases raise a red flag about the potential harmful climate impacts of alternative fuels. Despite biofuels’ image as a ‘green’

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