Why do oil refineries smell?

Oil refineries can have strong odors due to the release of volatile organic compounds (VOCs) and hydrogen sulfide during the refining process. These emissions often arise from the processing of crude oil and the handling of various chemicals. Additionally, factors like equipment leaks, flaring, and storage tank operations can contribute to the unpleasant smells. The combination of these emissions can create a noticeable odor in the surrounding areas.