The Environmental Protection Agency has issued an emergency waiver allowing continued sales of E15 gasoline through the remainder of the summer driving season, a move welcomed by biofuel producers who say it provides certainty for fuel retailers and consumers. E15, a gasoline blend containing 15% ethanol, is approved for use in most vehicles on U.S. roads and is often sold at a discount to conventional fuel. Federal regulations have historically restricted summertime sales in some markets because of air-quality concerns, prompting the EPA to issue temporary waivers in recent years. Growth Energy, the nation’s largest biofuels trade association, praised the agency’s action and urged Congress to pass legislation allowing year-round E15 sales nationwide. In a statement, Chief Executive Officer Emily Skor said farmers, fuel retailers and motorists should not have to rely on emergency waivers to maintain access to the fuel blend. The waiver preserves E15 availability through the end of the summer, while the broader debate over a permanent legislative solution continues in Washington.