With river pollution more in the news than ever before, and sewage now a hot topic, Helen Czerski and Tom Heap investigate how we can restore the health of our rivers. They talk to the Rivers Trust, which this week released its latest ‘State of our Rivers’ report, and ask whether water quality...

The world's oceans have absorbed huge quantities of carbon dioxide, protecting us from the worst effects of climate change, but how much longer can they defend us? Join Helen Czerski in New Orleans at the world's biggest conference of marine science to meet the experts working to keep the ocean...