what causes harm to living things?
toxins vitamins bacteria cyanide leeches h2o oxygen Pesticides
A B C D E F G H
Carbon monoxide and cyanide are poisons.
cyanide causes harm to living things
what causes harm to living things? (A) toxins (B) vitamins (C) bacteria (D) cyanide (E) leeches (F) h2o (G) oxygen (H) Pesticides