. >> we lead the nation in ethanol and biodiesel.are the net exporter of and have over 50 biodiesel and ethanol plants. >> the future of renewable energy is priceless. renewable energy comes into play everyday. havingn annual basis, the sun to power those panels, we are right up there with .awaii not quite as warm here in iowa, but we have great potential. >> there is potentially -- [indiscernible] [indiscernible] >> we have to be competitive. that means for looking to ways to improve efficiency and cost. iowa has done that. i seem to rack improvements over the time i have been governor. i am proud of you, smith we have made. i think the future is going to be even brighter. >> we hope you are energized about our message. >> iowa is a leader in renewable energy sources, and we know all the other states can follow us to. announcer: to watch all of the prize-winning documentaries in this year's competition, visit studentcam.org. c-span's "washington journal," live every day with news and policy issues that impact you. coming up saturday

from gas to ethanol and biodiesel. >> i want to make sure that being energy dependent is a national securityssue. what is something awful were to happen around the world in countries that we are dependent on for our energy needs? if something went wrong overseas we would have a real problem so being ended just energy independent helps our national security -- energy independent helps our national security. >> we are a supporter of ethanol and continue to look for biodiesel and ethanol plans. >> the future of renewable energy is bright as new energies like solar come into play every day. >> on an annual basis, having the sun to power those panels, we are right up there with hawaii, believe it or not, not quite as warm here in iowa but we have great potential. >> power, like the wind, it will change. costs will come down. there is discussion that there is potentially going to be a way to store solar energy. we have to be embedded in it, looking for ways to improve the efficiency and reduce the cost. iowa has done that. i have seen dramatic improvement over the time i have been governor and i a