New nuclear plants are so costly that spending the same on micropower can save two to 10 times more CO2, and sooner. By the age of 28, he had worked out that the US could phase out fossil fuels not at a cost, but at a profit.

Our panel included scientists - former World Bank chief scientist and now the British government's scientific adviser on climate change, Bob Watson, Indian physicist and ecologist Vandana Shiva, Kenyan biologist and Nobel prize-winner Wangari Maathai; activists - Guardian columnist George Monbiot and head of Greenpeace International Gerd Leipold; politicians - Green party co-leader and MEP Caroline Lucas, and London mayor Ken Livingstone; sustainable development commissioner for the UK government Jonathon Porritt and novelist Philip Pullman. Salomon, 47, says that by 2010, at least 10% of all the energy consumed in Freiburg will come from renewables. With his friends Kirat Singh, Sahir Doshi and Suraj Bishnoi, he set up Kids For Tigers which works in hundreds of schools. But he may play a much greater role in the global environment debate as chairman of Eskom, the state-owned power company that runs South Africa's only nuclear plant and, starting in 2008, is hoping to build dozens of fourth-generation small-scale nuclear stations. A pub once frequented by Charles Dickens, among others, The Trafalgar Tavern is certainly one of London’s more famous pubs, and perfect for anyone planning a private dinner in and around the Greenwich area.

But the climate stakes have risen with every new scientific report, and the politicians and environment groups have moved on. Women would take the pots to the river nine days later to compare and exchange seeds so that each family could plant the best seeds, thus optimising food supplies.

Nearly one in three of the people chosen has a scientific background, even if not all practice what they studied. It was a defining moment in the American debate and forced Bush to regulate carbon dioxide pollution from motor vehicles under the Clean Air Act. The Horn of Africa is one of the regions most vulnerable to climate change and extreme weather events are occurring with increased frequency and intensity.Hermann Scheer, 43, is the MP who persuaded the German government to get rid of nuclear power and invest heavily in renewables such as wind and solar power.

If you're going to talk in front of an audience it's fun to visualize how big that audience size looks. He hopes to announce its creation next year, a step forward that will place him firmly back in the spotlight. Roy's idea is that India and Africa are full of people with skills, traditional knowledge and practical resourcefulness who are not recognised as engineers, architects or water experts but who can bring more to communities than governments or big businesses. Historic Glaziers Hall in London Bridge has numerous large private dining spaces spread across its three floors, some of which come with up-close-and-personal views of the River Thames.It had looked certain that the world's politicians would back a US proposal giving the World Trade Organisation the power to override international environment treaties, but he shamed the ministers into voting it down. Larger parties should check out private hire of the whole venue, which opens up all the unique spaces from top to bottom of the townhouse, as well as giving you a huge range of food options. While Maathai is feted abroad as the first African woman Nobel laureate, she has always had a rocky time at home with party politics. She has worked as a farmer since the age of seven, never went to school and has never heard the words "wheat" or "turnip".