VOA慢速英语:Trump Changing Obama Environmental Policies

executive – n. a person who manages or directs other people in a company or organization

greenhouse gas - n. a layer of gases, such as carbon dioxide, that trap the warmth from the sun in the Earth's atmosphere

emission – n. producing or sending out something, such as energy or gas

regulation – n. an official rule or law that says how something should be done

abdication – n. to fail to do what is required by duty or responsibility

efficiency – n. the ability to do something or produce something without wasting materials, time, or energy : the quality or degree of being efficient

straightforward – adj. easy to do or understand : not complicated

hoax - n. something that is not true