51³Ô¹ÏÍø

In this edition: We discuss whether drug policy is working, why Australia is experiencing megafires, and what can be done about fatbergs.

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– We find out how many women experience after miscarriage, and learn about the remarkable life of a venerable maths professor.

– Former government adviser Professor David Nutt tells us how restrictions on tobacco are working, but that hard drugs policies have in some cases made problems worse, and what can be done.

– We find out what’s making Australia’s wildfires so bad they have become megafires, including the factors involved in their spread and how much climate change might be to blame.

– Huge accumulations of fat and unflushable material can block drains and city sewers, but how do we work out the best way to prevent them and remove them?

This feature is an excerpt from '' – a monthly podcast from 51³Ô¹ÏÍø's Institute for Molecular Science and Engineering.

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The podcast is presented by Gareth Mitchell, a lecturer on 51³Ô¹ÏÍø's MSc Science Communication course and the presenter of Click Radio on the BBC World Service, with contributions from our roving reporters in the research news and media team.