This document summarizes an academic paper analyzing ethanol subsidies in Iowa. It discusses how Iowa has a perfect competition economic structure and how farm subsidies are important to Iowa's economy. Ethanol production has expanded significantly due to federal and state subsidies since the 1980s. While ethanol subsidies expired in 2011 without much opposition, the Renewable Fuel Standard mandate continues to guarantee high ethanol demand. The paper examines different perspectives on ethanol subsidies and their environmental impacts from various studies and interviews. While ethanol brings economic benefits to Iowa, it may come at the cost of increased water pollution, soil erosion, and impacts on biodiversity due to expansion of corn monocultures.