As we look for alternatives to oil and try to develop new technologies, we are tapping into an entire periodic table of new important commodities. These rare earth metals are the basis of a whole range of new "green" products. Lisa Margonelli is here to help us understand them. She's a regular Takeaway contributor who writes the energy blog for The Atlantic and is the author of Oil on the Brain.
"We're going to need to think about how we recycle the car even before we build it."
—Lisa Magonelli on developing new technologies