WTP 117: Drinking sewage water, carbon trading schemes, the digital ghetto

This week, we look at the trading of carbon dioxide emissions. How does it operate and how efficient has it been? We head to the UK to find out about what some are calling a ‘digital ghetto’ amongst Muslims. And there’s a fresh-tasting report from Singapore about how citizens there are coming to terms with having to drink treated sewage water. Delicious. With The World’s Alex Gallafent.