Gary Cohen assesses the scale of pollution generated by medical waste and explains why hospitals and clinics need to adopt greener practices. This talk was filmed at TEDxMadrid. All TEDx events are organized independently by volunteers in the spirit of TED's mission of ideas worth spreading. To learn more about TEDxSHORTS, the TEDx program, or give feedback on this episode, please visit http://go.ted.com/tedxshorts.