emissions - n. the act of producing or sending out something (such as energy or gas) from a source

mandate - v. an official order to do something

vapor - n. a substance that is in the form of a gas or that consists of very small drops or particles mixed with the air

indigenous - adj. produced, living, or existing naturally in a particular region or environment

tropical - adj. of, relating to, occurring in, or used in the tropics

tipping - adj.