conclusive - adj. showing that something is surely true
characteristic - n. a special quality of someone or something
herbicide - n. chemical used to kill plants and weeds
substantiate – v. to prove the truth of something
conventionally – adv. usual or traditional
pesticide – n. a chemical that is used to kill animals or insects that damage plants or crops
polarization – n. people dividing into separate and opposing groups
commercialized - adj. relating to something done to earn money; for business purposes
consultant - n. a person who gives advice or services to a company in exchange for payment