Can the Oceans Save Us from Climate Change?

How do we get our healthy rivers back?

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 has got better or worse since the last survey three years ago.

They delve into the history of our water system – from the creation of the Victorian sewer network after the “Great Stink” of 1858, to the 21st century Thames Tideway Tunnel, London’s super-sewer currently under construction. But have we got our whole water system wrong? Tom and Helen ask whether regarding water as a one-way disposal system has partly created the mess our rivers are in today. They also hear about some waterfleas with remarkable powers to suck pollutants out of water.

Produced by Emma Campbell for BBC Audio Bristol in conjunction with the Open University

Can the Oceans Save Us from Climate Change?

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 working for us.

Tom and Helen's guests from the American Geophysical Union conference include Jeremy Werdell of NASA and Jaime Palter of Rhode Island University.

With special thanks to the team at the AGU and David Mann of Loggerhead Instruments.

Produced by Alasdair Cross for BBC Audio Bristol in conjunction with the Open University

Can Politicians Save the Planet?

Why do politicians have such trouble sticking to their environmental promises? Why are they happy to hug a husky one minute, desperate to ditch the 'green crap' the next?

As Labour ditch their £28bn commitment to green the economy, Tom Heap and Helen Czerski are joined by a panel of insiders to analyse the electoral gains and costs of environmental policies and consider the best strategies to maintain the focus of those in power on the greatest challenge to the planet.

Sophie Howe was the Future Generations Commissioner of Wales, charged with ensuring that government policies did no harm to the unborn citizens of Wales. Her pressure helped put a stop to a new motorway in South Wales and supported the government's virtual moratorium on road-building and 20mph zones in built-up areas. Tara Singh is a public affairs advisor with the PR company, Hill and Knowlton. She was a government advisor at the time that Prime Minister David Cameron cancelled commitments on home insulation and put a stop to new onshore wind farms in England. Professor Colin Davis holds the chair in Cognitive Psychology at Bristol University. He has taken part in Extinction Rebellion protests and has a particular interest in the psychological factors that prevent politicians and the public acting against climate change.

Produced by Alasdair Cross for BBC Audio Bristol in conjunction with the Open University.

Alien Invasion

Should we celebrate the arrival of new species to the UK or drive them out? Tom Heap and Helen Czerski investigate the role of alien invasive species in the British countryside and beyond. Tom and Helen hear about non native earthworms invading North America, posing a threat to forests by changing the soil. They discuss whether it's now time to be less judgmental about alien invasive species with Professor Chris Thomas, an expert in Anthropocene Biodiversity at the University of York. Rare Earth meets conservationists 'holding the line' against Grey Squirrels on Tayside, to give Red Squirrels a chance to re-establish. Ecologist Conor McKinney shares his experiences of trying to keep the remote St Kilda archepelago, off Scotland, free of invasive predators which could decimate the islands' globally important seabird breeding colonies.

Produced by Sarah Swadling for BBC Audio Bristol in conjunction with the Open University

Can We Build a Better World with Wood?

From the emotional balm of a walk in the woods to the first wooden skyscrapers, Tom Heap and Helen Czerski ask if we can replace a world of concrete and steel with a wooden utopia. Will the Wood Age be healthier for us and for the planet?

Michael Ramage of Cambridge University explains how the development of Cross-Laminated Timber makes it possible to build pretty much any building with wood while Tim Searchinger of Princeton University argues that turning forests into construction material has a high carbon cost for the planet.

Produced by Alasdair Cross for BBC Audio Wales and West in conjunction with the Open University