BBC Radio 4 on peak oil and climate change

Today BBC Radio 4 talked to oil geologist and local energy farms advisor Jeremy Leggett about OPEC and $100 oil prices - Leggett says "we haven't seen anything yet." Later in the broadcast, Radio 4 covered the newly released IPCC 4th Assessment on climate change, which notes that climate change is "severe and so sweeping that only urgent, global action" can head it off.