Greenpeace has teamed up with energy supplier npower to market a green electricity supply in a bid to help tackle global warming. "Juice" will allow domestic customers to buy power generated from offshore wind. By 2003, Juice will be sourced from North Hoyle wind farm, which is to be built off the coast of north Wales by National Wind Power, npower's sister company, subject to a planning permit. Until then, Juice supplies will flow from existing onshore wind turbines and hydro. Juice will be available to up to 50,000 customers and will cost the same as npower's conventional supply. If it becomes fully subscribed, the service will more than double the number of customers buying green electricity -- currently running at around 20,000. Matthew Thomas from npower says: "We believe Juice will help kick-start the renewable energy revolution in the UK. Consumers can now invest in the future of clean energy, and show their support for wind power, without paying more." It is the first time Greenpeace UK has got together with an energy company to market a consumer product. Greenpeace says its aim is to build visible and active support for offshore wind and to give supporters a chance to become involved in a solution to climate change. "When we hear about ice caps melting and floods increasing it's easy to think that global warming is too big a problem to tackle," says Matthew Spencer from Greenpeace. "Juice offers hope by giving individuals a simple and effective way of doing their bit to fight climate change through their electricity bill."