Sir David Attenborough, Britain's favourite naturalist, joined UKTV Documentary for a live web chat to mark the premiere of his documentary Attenborough Explores... Our Fragile World.
As well as championing the need to take action to prevent further climate change, he also talked about his highlights during an extraordinary career, his scariest moment and his abiding love for our natural world. Plus find out what animal he thinks he's most like...
Sir David Attenborough: Welcome to the live chat. I've hope you've enjoyed watching the programme and I'm ready for a lively discussion. I look forward to answering your questions.
LucyM: I have always been inspired by your work since getting the life of birds for christmas aged four. When I am older, I want to be a conservationist but at the moment, there is little I can actively do as a 14 year old living at home, and still at school - there aren't many rainforests near where I live! How could I get involved in conservation?
Sir David Attenborough: The need for conservation is not restricted to rainforests. It's needed here just as much. If you wanted to become involved contact your County Wildlife Trust or the World Wildlife Fund HQ in Surrey.
Takara: David do you think the siting of great white sharks and other bigger warm water preditors are because of shift in weather and gulf stream?
Sir David Attenborough: Certainly marine species of fish and indeed turtles have started to move northwards as our coastal waters are warmed. I am not aware of the great white shark here but it is not impossible.
SimonB: What species of animal do you think will be next extinct due to global warming?
Sir David Attenborough: The polar bear is the most endangered species from this particular cause. Coral reefs too are in real danger.
Antz: What is the single biggest contributor to global warming?
Sir David Attenborough: The way we generate our energy is the biggest cause.
Carlos9: What do you think about the governments decisions on acting to combat climate change?
Sir David Attenborough: Certainly our government is making the right demands but to be effective it will require agreement by all nations and that's very difficult to achieve.
Jan: Hi, I am so distressed looking at your programme Sir David but even more so that Russia and USA intend to drill for oil in the artic now its melting. How can we fight against this?
Sir David Attenborough: This can only be done by international agreement and certainly our own government is making the right demands.
IanL: Great programme - well done I watched with interest i've also watched al gores inconvenient truth where he suggests there are ways of returning the earths temperature to norm. Have you seen the film and do you think these could work?
Sir David Attenborough: I have seen the film but I believe that Al Gore recognises that there is nothing that we can do to return global temperatures to their previous low levels. The best we can manage is to slow the rate of warming.