Debate on the challenges facing world leaders at the start of the Copenhagen Climate Change Summit, with Climate Change Secretary Ed Miliband. Plus politics with Scotland's first Minister Alex Salmond and comedy with Rhod Gilbert.
192 countries in Copenhagen
In what some scientists are calling the most important summit of all time, nations from acrosss the globe are meeting to discuss climate change. The BBC's Roger Harrabin explains today's events.
The climate change sceptic
Bjorn Lomborg, from the University of Aarhus, Denmark, is author of The Skeptical Environmentalist and Cool It. He's a critic of Copenhagen.
The Energy and Climate Change Secretary
Ed Miliband speaks to Simon from Westminster. He explains what the UK government's aims are at the conference, what can be done to persuade developing nations and why it's all so important.