2011: U.S. EPA approves E15 (a fuel with 15% ethanol and 85% petroleum fuel) for use.
2014: The City of Chicago passes a measure allowing the use of E15 year-round due to their considerable air quality issues.
2018: President Trump directed the EPA to initiate rulemaking to allow for year-round E15 sales.
2019: The EPA finalized the rulemaking to allow year-round E15 sales as directed by President Trump. The rule was challenged in a federal court by the oil industry.
2020: U.S. EPA issues a nationwide temporary, emergency waiver of the summertime gasoline requirements allowing for the sale of E15 year-round.
2021: A federal court overturned EPA's 2019 finalized E15 rule, stating that Congress would need to pass legislation on the subject.
2022-2025: U.S. EPA issues a series of annual nationwide emergency waivers allowing E15 to be sold year-round.
December 2024: E15 is included in a funding package until stripped at the last minute.
February 2025: The Nationwide Consumer and Fuel Retailer Choice Act of 2025 is introduced into the 119th Congress. This bill becomes the foundation for year-round E15 language.
March 2025: NCGA and state corn farmer leaders hold a press conference on E15 on the grounds of the Capitol in Washington, D.C.
December 2025: Ethanol, agriculture, and petroleum industries reach an agreement about year-round E15 language, as requested by the administration. This language is a modification of the Consumer and Fuel Retailer Choice Act introduced in February 2025.
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