Carbon monoxide and carbon dioxide form a special subgroup of toxic chemicals, which may be in some cases originated even during the on-site visit of Crop Circles explorers, many days after the lightning discharge.
Monoksidi kaboni na carbon dioxide fomu kikundi maalum ya kemikali za sumu, ambayo inaweza kuwa katika baadhi ya kesi hata Asili Wakati wa ziara kwenye tovuti ya mazao Wapelelezi duru, siku nyingi baada ya kutokwa umeme.