A growing global population means we are facing a considerable housing shortage and it has been estimated that by 2025, as many as 1.6 billion individuals will face crowded substandard housing.But, the need to build more homes comes at a cost as in countries like the U.K., half of the population's carbon emissions come just from the buildings we inhabit. So, can we have sustainable housing that still meets the demands of a growing population?Plus in the news: painkillers that could actually be making your pain worse, the secrets of the earth's magnetic core and the truth behind the naked... Like this podcast? Please help us by supporting the Naked Scientists