This document discusses different ways of classifying resources. Resources are defined as anything available in the environment that can satisfy human needs if technologically accessible, economically feasible, and culturally acceptable. Resources can be classified based on their origin as biotic (living) or abiotic (non-living), based on whether they are renewable or non-renewable, based on who owns them, and based on their development status. Renewable resources like solar and wind energy and forests can be reproduced, while non-renewable resources like minerals and fossil fuels take millions of years to form and will eventually be exhausted.