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You might not want to wear your homemade device around your neck (or maybe you do, we wont judge), but it will be just as effective

If you have any questions, please ask before ordering

you will have to do research on tobacco and your filter tubes but Amazon carries the tubes and your local tobacco store carries most

Our study has shown that used cigarette filters can be transformed into a high performing carbon-based material using a simple one step process, which simultaneously offers a green solution for meeting the energy demands of society, says co-author Professor Jongheop Yi of Seoul National University