Troy Bredenkamp, sr. vp of government and public affairs at the Renewable Fuels Association, talks about RFA's challenge to EPA's Science Advisory Board's report on the effectiveness of the RFS in reducing greenhouse gas emissions.

<p>Troy Bredenkamp, sr. vp of government and public affairs at the Renewable Fuels Association, talks about RFA's challenge to EPA's Science Advisory Board's report on the effectiveness of the RFS in reducing greenhouse gas emissions.</p>

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