Tonight BBC 2, 20:00pm
In this final part of the series, Professor Iain Stewart looks at a new force that is shaping the planet - us. It's easy to think of the human impact on the planet as a negative one, but as Iain discovers, this isn't always the case. It is clear that humans have unprecedented control over many of the planet's geological cycles; the question is, how will the human race use this power?
For further details, please visit the programme link below:
Iain Stewart visits a city devoured by mud
Iain Stewart visits the international seed vault in Svalbard