<Li> Ubiquitous resources are found everywhere (e.g., air, light, water). </Li> <Li> Localized resources are found only in certain parts of the world (e.g., copper and iron ore, geothermal power). </Li> <P> Actual vs. potential natural resources are distinguished as follows: </P> <Ul> <Li> Actual resources are those resources whose location and quantity are known and we have the technology to exploit and use them . </Li> <Li> Potential resources are the ones of which we have insufficient knowledge or we do not have the technology to exploit them at present . </Li> </Ul>

How many types of resources do we have