Resources have three main characteristics: utility, [[quantity]] (often in terms of availability), and use in producing other resources. However, this definition is not accepted by some, for example [http://en.wikipedia.org/wiki/Deep_ecology deep ecologists] who believe that non-human elements are independent of human [[values]]. | Resources have three main characteristics: utility, [[quantity]] (often in terms of availability), and use in producing other resources. However, this definition is not accepted by some, for example [http://en.wikipedia.org/wiki/Deep_ecology deep ecologists] who believe that non-human elements are independent of human [[values]]. |