Iowa lawmakers last week continued their defense of the Renewable Fuels Standard (RFS) against a full-scale assault by the oil industry and others.
Iowa Sen. Charles Grassley pressed the Environmental Protection Agency (EPA) to increase the transparency of the market for Renewable Identification Numbers or RINs. He expressed concerns that the RIN market is being manipulated by Wall Street banks and other financial institutions that could undermine the effectiveness of the RFS.
The RIN trading...
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