burden - n. someone or something that is very difficult to accept, do, or deal with

fossil fuels - n. a fuel (such as coal, oil, or natural gas) that is formed in the earth from dead plants or animals

litigation - n. tan issue that is decided and settled in a court of law

meritorious - adj. deserving honor or praise

phenomenon - n. someone or something that is very impressive or popular especially because of an unusual ability or quality

plaintiff - n. a person who sues another person or accuses another person of a crime in a court of law

remedy - n. a medicine or treatment that relieves pain or cures a usually minor illness