Associated Press: In a corner of the Navajo Nation burdened by old and heavily polluting coal-fired power plants, it matters little to many tribal elders that another facility promises to be the most efficient and cleanest of all. With two plants already a dozen miles away, the last thing they want is another one even closer, a 1,500-megawatt project barely two miles in another direction. “We want the smoke to stop,” said 76-year-old Alice Gilmore in Navajo, raising a hand toward the …