Four-fifths of Maine households – the largest share in the nation – use oil for space heat. Maine generates a larger share of its electricity from non-hydroelectric renewable resources (mostly wood and wood-waste) than any other State. Maine is the only state in which industry is the largest energy consuming sector. There are four sectors: residential, commercial, industrial and transportation. In 2007 electricity generated in New England came from the following sources: Natural gas – 29.3 percent; nuclear – 27.5; coal – 11.9; oil-gas – 11.7; wood-refuse – 3.4; hydro – 4.8; the balance (pumped storage and other renewables) – 2.