odor

Source of chemical smell in Chicago area is unknown: fire officials
Chicago-area residents have been calling 911 to report a chemical smell on Sunday, officials say, but the source is not yet known.
New effort to end 'rotting' smell coming from South Side factory
BP Whiting oil refinery leak causes natural gas smell in suburbs
Natural gas smell reported in suburbs believed to be coming from Iowa
Flaring at BP refinery prompts NW Ind. residents to report smell
NW Indiana residents report sulfur smell; investigation underway
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New effort to end 'rotting' smell coming from South Side factory
BP Whiting oil refinery leak causes natural gas smell in suburbs
Natural gas smell reported in suburbs believed to be coming from Iowa
Flaring at BP refinery prompts NW Ind. residents to report smell
NW Indiana residents report sulfur smell; investigation underway