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NREL converts lignin into a nylon precursor with microbes

In the wild, P. putida naturally produces β-ketoadipic acid. NREL scientists used genetic engineering to make the process more prolific. Figure by Allision Werner, NREL

October 3, 2024

BY U.S. Department of Energy

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Miller-Meeks questions Wright on DOE’s request to virtually eliminate biofuel budget

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By Erin Krueger

April 23, 2026

Policy Sustainable Aviation Fuels Advanced Biofuels Cellulosic/Advanced  Feedstocks 

Rep. Mariannette Miller-Meeks, R-Iowa, pressed U.S. Energy Secretary Chris Wright on his support for biofuels and the administration’s request to reduce DOE funding for renewable fuels by 98% during an April 16 congressional hearing.

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Nearly 1.93 billion RINs were generated under the RFS in March, up 1% when compared to March 2025, according to data released by the U.S. EPA on April 16. Total RIN generation for the first three months of the year reached nearly 4.9 billion.

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The U.S. EPA on March 27 announced the RFS cellulosic waiver credit (CWC) price for 2025 has been set at $1.91, up from $1.61 for 2024. The CWCs are being made available due to the agency’s decision to reduce the 2025 cellulosic RVO.

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The U.S. EPA on March 27 finalized the 2026 and 2027 RFS RVOs at levels higher than originally proposed. The increase is attributed to the decision delay implementation of provisions penalizing imported fuels and feedstocks until 2028 or later.

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Nearly 1.65 billion RINs were generated under the RFS in February, down 10% when compared to the same month of last year. Total RIN generation for the first two months of 2026 reached 3.44 billion, down 2% when compared to the same period of 2025.

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