Original sentence: The Chemtrail conspiracy theory claims that some trails left behind jet aircraft are different in appearance and quality from those of normal contrails, may be composed of harmful chemicals, and that these different contrails are being deliberately produced, and covered up by the government.The belief is that a chemical and/or biological agent of some sort is being released
Edited sentence: Private citizens have made numerous reports that chemical and/or biological agent of some sort have being released, and are associated with certain respiratory, skin and neurological abnormalities.The Chemtrail conspiracy theory is a term designed to minimize assertions that some trails left behind jet aircraft are different in appearance and quality from those of normal contrails, may be composed of harmful chemicals, and that these different contrails are being deliberately produced, and covered up by the government