to make a plasma-enhanced melter. there is no perfect solution. however, there are technologies to help us to stop with this waste and help give us a better future. >> to see all the winning entries in this year's competition, visit studentcam.org. >> all this month, see the winners of c-span's student cam video documentary competition. middle and high school students from 45 states submitted videos on one of the country's greatest strengths or challenge the country is facing. watch the top-winning videos every morning on c-span at 6:50 eastern, just before "washington journal." and at 8:30 during the program, meet the students who made them, and for a preview all the winners, visit studentcam.org. >> you're watching c-span, created for you as a public service by america's cable companies. .

a lot of materials you want to vitrfy are made up of those harmless and harmful materials. what the depoys came up with, using a sort of a plasmane where it was a very hot gas inside a contain that are could break apart the waste material no a component at toms. it's fundamentally a vitrification melter with as plaza so that the inoregon tick materials go into the deprs and the organic materials becomes gas. >> so basically this is how it works. waste is brought into a pregas sight. there the waste gives off hydrogen and carbon gases. the waste falls no a chamber. there, temperatures can reach up to 10,000 degrees cell see youse. it converts the waste into functioning elements. everything else turns no a metal compound. and the byproducts? >> the only buy product are the kind of glass. it looks like obsidian. on one of our videos, a former ce sonch and scientist it can be used in the construction of roads to go into asphalt or as gravel to go into asphalt or concrete defending on how finely it's smashed up. the final product is sin gas. it is a mixture of carbon and hydrogen gas. if you take all the garbage that we today land p

to use much of it to get some good video equipment. >> carl, thanks for joining us today. >> thank you. >> let's watch a little bit of carl's video, wasting waste. >> representative is talking about technology called plasmark gasification. i am interviewing the president and chief executive officer which at this company which uses this technology. >> as you can see, carl's entire documenty and other winning videos any time. just go to student cam.org. host: craig holman is with public citizen and here to talk with us about revolving door and financial sersvisses and some of the law makers, at least 70 former law makers of congress who are now lobbying. what's wrong with that? guest: the revolving door is one of the most pernicious and effective means of influence peddling on capitol hill. if i can provide a little background. what the revolving door constitutes, the revolving door spins two ways. first, the most prevalent way is when former government officials leave office, leave public office and then take a job as a lobbyist for the exact same corporations or special interests that had business pending before them when they were in office. the second form of the revolving door is what we call the reve