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