Brazil's biofuels-production targets must be integrated into a broad agricultural strategy to prevent deforestation or conversion of farmland, which will erode the carbon benefits of biofuel use and production, according to John Timmer. He cites a study to be published in the Proceedings of the National Academies of Science. To achieve the mandated biofuels targets for 2020, Brazil would have to expand acreage for sugar cane and soybean, which will lead to forest loss and farmland conversion, Timmer writes.

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