A resource is a source or supply from which a benefit is produced and that has some utility. Resources can broadly be classified upon their availability – they are classified into renewable and non-renewable resources. Examples of renewable resources are air, water, natural gas, wind, solar energy, etc.
Everything is available in our environment which can be used to satisfy our needs provided it is technologically accessible, economically feasible and culturally acceptable can be termed as a Resource
Resources can be defined as the things which are available in our environment and satisfy human needs and are economically feasible, culturally acceptable and technically accessible.