Spanish power company Iberdrola said it plans to invest $8 billion (5.1 billion euros) in the US between 2008 and 2010. The Bilbao-based firm is aiming to have a 15 per cent share of the wind power market in the US by 2010, it added. It had a wind power production capacity of 2,400 megawatts in the US at the end of March and it expects to reach 3,600 megawatts by the end of the year, the statement added. Iberdrola chairman Mr Ignacio Sanchez Galan has said he considers the US as the company's most exciting growth market. The US, which uses roughly one-quarter of the world's crude oil, is seen as a promising market for renewable energy sources as concerns over climate change and the rising price of oil boost demand for alternatives to fossil fuels. Iberdrola posted a firstquarter net profit of 1.2 billion euros, up from 458 million euros over the corresponding period the previous year, due mostly to its purchase of Scottish Power.