Many big cities around the world have issues with urban waste. Think of the garbage bags piled up on New York's streets or Jakarta's open dumping. But Singapore has managed to avoid much of this problem thanks to incineration.

David, a year 12 student from Western Australia, uncovers the ins and outs of Singapore's trash system in this episode of Podcast Next Gen.

Podcast Next Gen is a collaboration between Cosmos Magazine and the National Youth Science Forum.

The reporters are year 12 students from across Australia - the next generation of scientists, science journalists and podcasters. These 'shortcast' episodes have been written and recorded by the students, giving them the opportunity to work with real science journalists and editors to make their science concept come to life.