Battle develops on farm pollution reporting
US - It's one thing to know that the hog farm down the road smells bad. It's another thing to know whether it's a health hazard. Factories and refineries are required by law to tell federal, state and local agencies which toxic chemicals they are releasing and how much. Livestock farms put out emissions, too, including ammonia and hydrogen sulfide, and a court decision could force them to start disclosing those emissions - unless Congress intervenes.