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"Solutions" and "sustainability" seemed to be two words that were everywhere during the recording of this week's show. Mike went along to one of the biggest eco housing exhibitions in Europe to investigate the latest ideas on making our homes and offices more environmentally friendly. He finds a plethora of businesses promising to solve our energy woes, from green loos to green roofs.

The UK government was also out in force at the exhibition promoting it's new drive to make millions of homes more energy efficient. Mike bumps into Ed Miliband, the Secretary of State for Energy, to discuss our future homes - plus he asks Mr Miliband, as the UK's representative at the UN's climate change summit, what happened at Copenhagen.

Also in this week's show, we go for a swim outside on a very cold morning in London - well, Mike opts out, but we hear someone else braving the ice. Plus we discuss the end of civilisation with the author of the hugely successful The World Without Us, Alan Weisman. Listen and learn how to destroy a barn, and what the fossils of the future will be.

As ever, tune in or download the podcast and let us know what you think. You can email Mike and the team at oneplanet@bbc.com, or join in the debate on our Facebook page, the link's below.