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Science 9 February 2007:
Vol. 315. no. 5813, pp. 808 - 810
DOI: 10.1126/science.1137013
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Perspective

Ethanol for a Sustainable Energy Future

José Goldemberg*

Renewable energy is one of the most efficient ways to achieve sustainable development. Increasing its share in the world matrix will help prolong the existence of fossil fuel reserves, address the threats posed by climate change, and enable better security of the energy supply on a global scale. Most of the "new renewable energy sources" are still undergoing large-scale commercial development, but some technologies are already well established. These include Brazilian sugarcane ethanol, which, after 30 years of production, is a global energy commodity that is fully competitive with motor gasoline and appropriate for replication in many countries.

University of São Paulo, São Paulo, Brazil.

* Presently Secretary for the Environment, State of São Paulo, Brazil.

E-mail: goldemb{at}iee.usp.br

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