What type of resource is the sun? 
 not a resource 
 none of the above 
 a nonrenewable resource 
 a renewable resource
 Which of the following is a nonrenewable resource? 
 coal 
 wind 
 sunlight 
 water power 
 How could a renewable resource become nonrenewable? 
 very high rate of use 
 naturally over time 
 alternative technologies 
 evolution