Demand for those resources in the market
yearly consumption

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 a. Resources are important for the sustenance of human life and also for maintaining the quality of life.
b. Resources are basic requirement for economic development be it land, water, energy resources, minerals.
c. Things available in the environment are to be economically feasible, must be within everybody's reach and available at cheap rate. d. They must be technologically accessible implies that mere availability of resources is not enough, it is important to have required technology to harness such resources.. Appropriate technology will ensure optimum utilisation of such resources.
e. And culturally acceptable, resources must be acceptable by society at large,
f. The use of resources also depends on time , technology, on the human knwoledge, ideas which tranforms resources into something valuable.
g, Human beings ideas laeds to discovery , inventions and causes further inventions. 
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