states. which gets -- uses it as well and doesn't produce it. >> it's a secret that many people don't know. some of the stuff that gets us energy or allows to us use energy more efficiently uses this rare earth minerals. it never comes to our attention. >> exactly. >> we do need those but we then can have clean air energy. i think it's something we'll talk about a lot more often. thank you. >> thanks, ali. improving health and education, the foundation, it is changing the world one huge solution at a time. not small ideas. big ideas. today's big i coming up after the break. ybe... we're going to hike up here, so we'll catch up with you guys. [ indistinct talking and laughter ] whew! i think it's worth it.