(Duluth, MN) -- Duluth's mayor wants the Environmental Protection Agency to review the use of hydrogen fluoride by refineries like Husky Energy's operation in Superior.

Mayor Emily Larson will ask the Duluth City Council to approve a resolution at its Monday meeting. She says communities haven't been made aware of the danger of HF and she hasn't seen proof that safer alternatives aren't viable. Dozens of people had to seek medical treatment and others were evacuated when the refinery exploded last year.