Transition Penwith

asin: B000IU4DO6 binding: DVD list price: £19.99 GBP amazon price: £4.49 GBP

It's not a horror film, but An Inconvenient Truth is certainly one of the scariest DVDs you could own. Presented in a straightforward format by former US Vice President Al Gore--think Royal British Institute lecture delivered with a Tennessee drawl--it sets out its compelling argument about climate change both methodically and entertainingly. Global warming is a real danger, argues Gore, and human civilisation is the root cause of it.

asin: B0012YG7PA binding: DVD list price: £15.99 GBP amazon price: £14.29 GBP

The 11th Hour may not have enjoyed the profile of the last major documentary to tackle the issues and challenges of climate change (that'd be Al Gore's engrossing Oscar-winner An Inconvenient Truth), but it's no less compelling, and proves to be a thought-provoking feature in its own right.

Producer and narrator Leonardo Di Caprio, who also shares a writing credit, is the glue that holds The 11th Hour together, and this diligent documentary presents a lot of information.

asin: B00179CXIK binding: DVD list price: £15.99 GBP amazon price: £14.29 GBP

At one point a sceptic of the environmental impact of humans, Sir David Attenborough has more than redressed the balance with this fascinating two hour documentary, The Truth About Climate Change.

It's split into two parts, as the first half of The Truth About Climate Change examines some of the high profile natural disasters of the past few years, and questions how much of a part humans had to play in them. Attenborough also discusses various other lower profile environmental changes too, and what kind of impact they're having.