What is the key concept for this section? Give two examples of promising substitutes for key mineral resources. What is nanotechnology and what are some of its potential environmental and other...

What is the key concept for this section? Give two examples of promising substitutes for key mineral resources. What is nanotechnology and what are some of its potential environmental and other benefits? What are some problems that could arise from the widespread use of nanotechnology? Describe the potential of using graphene and phosphorene as new resources. Explain the benefits of recycling and reusing valuable metals. List five ways to use nonrenewable mineral resources more sustainably. What are two examples of research into substitutes for rare earth metals? Explain why uneven distribution of lithium among various countries is a concern.