The Greenpeace flagship, Rainbow Warrior, has begun the first leg of a "Choose Positive Energy Tour," a global journey by Greenpeace to support the development of renewable energy around the world in the lead up to the Earth Summit in Johannesburg, starting this month. Rainbow Warrior is touring the North Sea area while a second Greenpeace ship, Arctic Sunrise, is touring South East Asia, taking in the Philippines and Thailand where communities are rejecting dirty coal fired power stations and demanding clean renewable energy, says Greenpeace. Rainbow Warrior first sailed to Horns Reef in Denmark, where the world's largest offshore wind station is being built. Offshore wind in the North Sea alone could supply over a third of the electricity needs of is border countries, says Greenpeace. Renewable energy is ready and able to replace dirty coal, oil, gas and nuclear power not only in the future, but today, says Greenpeace's UK director Stephan Tindale. "There needs to be a massive expansion of renewable energy supplies in the northern industrialised countries to make renewable energy cost effective enough to take off in southern countries," he adds. "Wind energy is competitive with coal and gas power generation and clearly beats the more expensive nuclear power. Greenpeace is campaigning for governments to make a commitment at the Johannesburg Earth Summit to provide renewable energy to the two billion people around the world who currently live without electricity.