theme – n. the main subject or issue that is discussed often or repeatedly
hire – v. begin to employ someone
exploit – v. to use (someone or something) in a way that helps you unfairly; to abuse someone
reciprocal – adj. used to describe a relationship in which two people or groups agree to do something similar for each other
undermine – v. make someone weaker or less confident
solar panel – n. a large, flat piece of equipment that uses light from the sun to create electricity