battery – n. an object that provides electricity for things

irreversible – adj. not able to be undone or changed

moratorium – n. the stopping of an activity for a certain period of time

sediment – n. a solid substance that forms a layer at the bottom of a liquid

food chain – n. a series of living things that are linked because each groups of things eats the groups below it in the chain

alternative – n. another way of doing something

bias – n. the action of supporting or opposing a particular person or thing in an unfair way, because of permitting personal opinions to influence your judgment

impact – n. a powerful effect something has on a particular person or situation

perspective – n. a particular way of considering something