4 words in this vocabulary list
noun the branch of biology that deals with the relations of organisms to one another and to their physical surroundings.
adjective An adjective is a word that describes or modifies a noun or pronoun. In this case, 'unsustainable' describes something that cannot be maintained or continued at its current rate or level.
noun the ability to survive or continue successfully
noun a measure of human impact on the environment, expressed as the amount of land required to sustain a person's lifestyle