The border of Washington and Oregon will soon be home to the world’s largest wind farm, producing enough power for 70,000 homes in 11 Western states. The wind-power company FPL Energy of Florida is beginning construction of the 450-turbine, 300-megawatt project next month and hopes to have it on-line by the end of the year. Oregon-based PacifiCorp has pledged to buy power from the farm for at least 25 years. Enviros, some of whom helped site the project to avoid bird flyways, are giving the project a big thumbs up.